Strengthening Arguments

A municipal power authority introduced automated smart meters across residential districts to detect voltage anomalies and isolate localized power outages automatically. During the six months following installation, the total duration of power outages experienced by residents in these districts decreased by 35 percent compared to the same period in previous years. Municipal officials concluded that the automatic anomaly detection of the smart meters was directly responsible for reducing outage durations.

Which of the following, if true, provides the strongest support for the municipal officials' conclusion?

A municipal public transit agency recently installed high-definition security cameras in all city buses to decrease instances of vandalism. Following the installation, reported cases of vandalism aboard buses dropped by forty percent over a six-month period. Consequently, transit officials concluded that the visible presence of the new cameras successfully deterred potential vandals from committing crimes on the buses.

Which of the following statements, if true, provides the strongest support for the transit officials' conclusion?

To reduce emergency room overcrowding, a city's health department opened several free outpatient clinics in low-income neighborhoods. Six months later, emergency room visits among low-income residents had increased by 12 percent. Consequently, municipal auditors concluded that the clinic program failed to reduce emergency room usage. Health administrators maintain, however, that the program is effectively accomplishing its intended goal.

Which of the following, if true, provides the strongest support for the health administrators' position?

Archaeologists examining slag remnants from an early Iron Age smelting site hypothesized that local artisans added roasted acacia pods to laterite iron ore as a flux to reduce furnace smelting temperatures. Chemical analysis of the slag revealed unusually high concentrations of calcium oxide and phosphorus pentoxide, elements minimal in raw laterite ore. Because adding organic flux allows laterite ore to melt at significantly lower temperatures achievable by basic charcoal furnaces, the researchers concluded that the presence of these compounds proves the deliberate inclusion of acacia pods in the smelting mixture.

Which of the following statements, if true, strengthen the archaeologists' argument? Select all that apply.

Marine biologists studying migratory blue whales observed a significant increase in whale calf survival rates in the North Atlantic over the past decade. The researchers hypothesized that strict international regulations limiting commercial ship speeds in feeding zones caused this increase by reducing lethal vessel strikes. However, critics claim that ocean warming altered krill distribution, concentrating prey in protected zones where whales naturally feed away from major shipping lanes.

Which of the following statements, if true, provide support for the researchers' hypothesis regarding the cause of the increased calf survival rates? Select all that apply.

Ecologists recently introduced a species of native predatory beetles into an agricultural valley to reduce the population of crop-damaging aphids. Over the following six months, aphid populations decreased dramatically across farms throughout the valley. The ecologists concluded that the introduction of the predatory beetles was the primary cause of the reduction in aphid populations.

Which of the following statements, if true, provide support for the ecologists' conclusion?

A technology firm recently deployed an automated AI-driven customer support chatbot to resolve routine user inquiries. After three months of deployment, the firm reported a 25 percent decrease in total customer service operating expenditures and concluded that the implementation of the chatbot directly caused this reduction in costs. Which of the following, if true, provides the strongest support for the firm's conclusion?

To mitigate drought-related crop failures, a regional agricultural council launched a subsidy encouraging farmers to adopt no-till seeding, a technique that leaves crop residue intact to retain soil moisture. The council predicts that widespread adoption of no-till seeding will significantly increase overall regional grain yields during severe drought years. Opponents point out that no-till seeding requires specialized planting equipment that consumes twice as much fuel per acre as traditional tillage implements.

Which of the following statements, if true, strengthen the agricultural council's prediction regarding overall grain yields? Select all that apply.

Archaeologists examining a 3,000-year-old Mediterranean shipwreck discovered several deposits of birch bark pitch, a compound historically used as a waterproof sealant. Because the pitch residues were found exclusively along the inner seams of the vessel's lower cargo hold rather than on the ceramic storage containers themselves, researchers concluded that the pitch was applied directly to seal the ship's wooden timbers during construction, rather than originating from leaked commercial cargo.

Which of the following, if true, most strengthens the researchers' argument?

To combat regional power grid instability, energy directors plan to construct geothermal plants along an active fault line, where subterranean heat is greatest. Skeptics claim that drilling deep geothermal wells in seismically active areas risks triggering earthquakes that damage local infrastructure. However, the lead engineers contend that operating these geothermal facilities will net a decrease in major seismic hazards. They reason that extracting subterranean thermal energy cools surrounding rock formations, inducing thermal contraction that gradually dissipates accumulated tectonic tension via harmless micro-tremors rather than catastrophic faults. Which of the following, if true, provides the strongest support for the lead engineers' contention?

To mitigate orbital space debris, a space agency proposes requiring all low-Earth-orbit commercial satellites to deploy drag sails—expandable sheets designed to increase atmospheric drag and accelerate reentry—at the end of their operational lifespan. Analysts calculate that drag sails will reduce the average deorbit time of retired satellites from thirty years to less than three years. Therefore, requiring drag sails on all future low-Earth-orbit satellites will substantially lower the total frequency of orbital collisions in low-Earth orbit over the coming decade. Which of the following, if true, provides the strongest support for the space agency's conclusion?

Paleoclimatologists analyzing mineral deposits in a subterranean cave network near an ancient settlement observed a sharp drop in trace isotope ratios between 1200 BCE and 1150 BCE, a metric that correlates with regional rainfall. The researchers concluded that a severe drought caused the sudden abandonment of the settlement during this timeframe. Skeptical historians argue instead that the abandonment was driven by the simultaneous collapse of regional trade networks.

Which of the following statements, if true, provide additional support for the paleoclimatologists' conclusion? Select all that apply.

Linguists analyzing the evolution of early writing systems hypothesized that the shift from pictographic symbols to abstract phonographic scripts was driven primarily by the economic necessity of recording complex trade transactions quickly. As commercial networks expanded across ancient Mesopotamia, scribes required symbols that could be impressed rapidly into clay rather than detailed pictorial representations. Therefore, researchers concluded that trade volume, rather than religious ritual or administrative governance, was the sole catalyst for script abstraction.

Which of the following statements, if true, provide support for the researchers' conclusion regarding the primary driver of script abstraction? Select all that apply.

To restore seventeenth-century canvas paintings damaged by ambient humidity, conservators introduced a synthetic non-polar solvent designed to remove degraded varnish without penetrating water-soluble paint layers. Five years post-treatment, paintings restored with the non-polar solvent exhibited a forty percent lower incidence of structural paint-cracking than paintings restored using traditional aqueous cleaning solutions. The lead conservator concluded that the non-polar solvent successfully prevents paint-cracking by leaving the moisture content of the underlying canvas fibers unperturbed. Which of the following, if true, most strengthens the lead conservator's argument?

Geochemists analyzing drill core samples from subglacial Lake Mercer in Antarctica discovered elevated concentrations of dissolved methane alongside specialized methanotrophic bacteria. Because these bacterial populations exhibit peak metabolic rates strictly within thermal gradients matching geothermal vents detected beneath the ice sheet, researchers concluded that geothermal activity, rather than surface organic runoff trapped during ice sheet formation, is the primary energy source sustaining the microbial ecosystem in the subglacial lake. Which of the following, if true, most strengthens the researchers' conclusion?

Ecologists observed that in coastal pine forests where native beetle populations recently declined, a species of parasitic fungus began infecting over 40 percent of mature pine trees. The ecologists hypothesized that the beetle larvae, which burrow into pine bark, deposit a chemical secretion that inhibits fungal spore germination, thereby protecting the trees from infection.

Which of the following findings, if true, would provide support for the ecologists' hypothesis? Select all that apply.

To alleviate traffic congestion during peak hours, municipal officials implemented a high-occupancy toll lane system on a major arterial highway, charging single-occupant vehicles a variable toll while allowing carpools free access. Eight months after implementation, average commute times along the highway corridor decreased by 14 percent. City administrators concluded that the toll policy successfully motivated solo drivers to switch to carpooling.

Which of the following statements, if true, provide support for the city administrators' conclusion? Select all that apply.

A regional logistics firm installed real-time thermal monitoring sensors on its refrigerated delivery fleet to reduce perishable food spoilage during long-distance transport. During a six-month trial, fleet vehicles equipped with these sensors experienced a 35 percent reduction in cargo spoilage compared to unequipped vehicles operating on identical routes. The operations manager concluded that real-time temperature alerts directly prevented spoilage by enabling drivers to adjust cooling settings immediately upon detecting system malfunctions.

Which of the following, if true, provides the strongest support for the operations manager's conclusion?

Urban planners monitored residential neighborhoods that planted dense rows of broadleaf deciduous trees along high-traffic arterial avenues. Over a five-year period, these neighborhoods experienced a 14 percent reduction in ambient daytime temperatures and a significant decrease in heat-related emergency room admissions compared to adjacent neighborhoods that installed reflective cool roofs. The planners concluded that the temperature reduction achieved by the tree canopies was directly responsible for the decline in heat-related emergency room visits. Which of the following statements, if true, provide additional support for the urban planners' conclusion? Select all that apply.

Agricultural researchers monitored tomato farms in a semi-arid region that adopted satellite-guided automated drip irrigation systems. Over three harvest seasons, farms utilizing the automated system reported a 25 percent reduction in water usage alongside a 15 percent increase in crop yields compared to their previous yields under manual drip irrigation. The researchers concluded that the automated system's precise real-time adjustments to soil moisture levels were directly responsible for the increased crop yields.

Which of the following, if true, most strengthens the researchers' argument?