Strengthening Arguments

Historians analyzing early twentieth-century iron gall ink manuscripts observed that documents stored in wooden cabinets suffered significantly less paper degradation than identical manuscripts stored in metal cabinets within the same archive room. The archivists concluded that volatile organic compounds emitted by the untreated cedar wood reacted with atmospheric moisture to form a protective barrier on the paper surface, thereby inhibiting acid hydrolysis of the cellulose fibers.

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

A water utility company in a drought-prone city plans to install automated pressure-regulating valves across its subterranean pipe network. The utility argues that by dynamically reducing water pressure during low-usage overnight hours, it will significantly decrease the total volume of water lost through minor background pipe leaks across the city.

Which of the following, if true, provides the strongest support for the water utility company's argument?

Municipal planners in City K recently installed permeable asphalt along downtown sidewalks to reduce surface runoff during storm events. During the first rainy season following installation, measured runoff volume entering the local river decreased by 30 percent compared to the historical seasonal average. The planners concluded that expanding the installation of permeable asphalt throughout all municipal districts will significantly mitigate urban flooding during future severe storms.

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

To protect centuries-old parchment manuscripts from humidity-induced decay, the curators of a national archive recently replaced the facility's traditional refrigeration-based cooling coils with advanced chemical desiccant air-drying units. Over the six months following the replacement, sensor logs confirmed that relative humidity in the vault remained perfectly stabilized within the ideal target range of 45% to 50%. Nevertheless, physical inspections conducted at the end of the period revealed that the rate of structural fiber cracking on the parchment manuscripts was twice as high as it had been during the six months prior to the equipment change. Concluding that the new desiccant units were directly responsible for the accelerated deterioration, the lead conservator recommended re-installing the original refrigeration-based system.

Which of the following, if true, most strengthens the lead conservator's argument?

A renewable energy company recently installed ultrasonic anti-scaling transducers along the fluid conduits of its geothermal power plant. Management hypothesized that high-frequency sound waves from these devices would prevent mineral deposits from adhering to the interior of heat exchanger pipes, thereby eliminating the need for periodic chemical cleaning shutdowns. Over the subsequent six-month evaluation period, the plant operated continuously without requiring a single descaling shutdown, and net electricity output remained constant. Management concluded that the ultrasonic transducers were directly responsible for preventing mineral scale accumulation during this period.

Which of the following, if true, most strengthens management's conclusion?

Archaeologists analyzing high-resolution synthetic aperture radar imagery of the Eastern Desert observed subsurface linear anomalies near ancient copper mines. Carbon dating of organic residue in nearby soil strata dates to the 12th century BCE. The researchers concluded that these linear anomalies represent buried irrigation canals constructed specifically to support the agricultural needs of the mining settlements.

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

Three months ago, a citrus orchard manager introduced a species of non-stinging predatory mite to combat Asian citrus psyllids, insects that transmit a destructive bacterial disease to orange trees. Over the subsequent three-month period, the population of Asian citrus psyllids in the orchard decreased by 60 percent. Based on this outcome, the manager concluded that the introduction of the predatory mites was responsible for the decline in the psyllid population.

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

To reduce agricultural nitrate pollution in local river systems, a regional water district plans to install floating artificial wetlands across its primary collection reservoirs. Critics argue that because the wetland plants enter dormancy during the winter—the season when agricultural runoff peaks—the system will fail to reduce nitrate levels when treatment is most needed. Nevertheless, environmental engineers maintain that installing these floating wetlands will substantially reduce the total annual amount of nitrates reaching the rivers. Which of the following, if true, provides the strongest support for the environmental engineers' prediction?

A municipal council recently planted thousands of fast-growing shade trees along residential streets with the goal of lowering household summer electricity bills. Council members reasoned that by shielding home roofs and exterior walls from direct sunlight during peak afternoon hours, the trees would significantly reduce the need for indoor air conditioning.

Which of the following, if true, most strongly supports the council members' reasoning?

Art historians recently analyzed a 14th-century illuminated codex of previously unknown origin and hypothesized that it was illuminated at Monastery X rather than at neighboring Monastery Y. In support of this hypothesis, the historians noted that chemical analysis of the blue pigment in the codex's illustrations revealed a specific trace ratio of mineral impurities identical to that of lapis lazuli imports recorded exclusively in Monastery X's financial ledgers from that era. Which of the following, if true, provides the strongest support for the historians' hypothesis?

Environmental scientists recently deployed underwater acoustic speakers broadcasting healthy reef soundscapes along a degraded coastline to attract free-swimming fish larvae, hoping to regenerate local kelp forests. Within six months of continuous broadcast, fish larval settlement along the treated coastline tripled, and local kelp canopy density increased by 40 percent. The scientists concluded that the soundscape-induced influx of fish larvae directly accelerated the recovery of the kelp forest. Which of the following, if true, most strengthens the scientists' argument?

A small local bakery introduced a new sugar-free pastry line last month, hoping to attract health-conscious customers. During that same month, the bakery's total sales increased by 20 percent. The owner concludes that introducing the sugar-free pastry line was the main cause of the increase in total sales. Which of the following, if true, most strengthens the owner's conclusion?

In the city of Valera, municipal authorities recently implemented a dedicated bus rapid transit (BRT) lane along the main commercial corridor, reducing automotive traffic lanes by fifty percent. Despite initial concerns from local merchants that the loss of driving lanes and street parking would reduce customer traffic, total retail sales along the corridor increased by twelve percent during the six months following implementation. City officials concluded that the BRT system was the primary driver of this increase in retail sales. Which of the following, if true, provides the strongest support for the city officials' conclusion?

A municipal health agency recently installed advanced air-purification filtration systems in all public primary schools located in Sector 4, a district known for high levels of industrial particulate pollution. Over the six months following the installation, student absenteeism due to respiratory illnesses in Sector 4 primary schools dropped by 30 percent compared to the same period in previous years. Concluding that the filtration systems were directly responsible for this health improvement, city officials plan to expand the installation of these systems to all public secondary schools in Sector 4.

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

Archaeologists analyzing late-Bronze Age settlements along the upper Rhine found that around 1200 BCE, local pottery began exhibiting high concentrations of pine resin, an organic sealant used to preserve liquids. Concurrently, environmental soil core samples reveal a sharp spike in regional timber harvests, despite evidence that local population density and building construction remained stable. Scholars conclude that the settlements increased tree-felling primarily to produce pine resin for export containers. Which of the following, if true, most strengthens the scholars' argument?

Urban planners in Metroville recently proposed planting deep-rooted oak trees along city avenues to expand the tree canopy and mitigate the urban heat island effect. Critics argued that the extensive root networks would crack adjacent underground water pipes, incurring massive municipal repair costs. In response, city planners pointed out that the target avenues are lined with modern flexible polymer pipes rather than traditional brittle clay pipes, concluding that the tree-planting initiative will not lead to pipe repair costs. Which of the following, if true, most strengthens the city planners' argument?

Biopharmaceuticals produced via cell culture require precise environmental stability inside bioreactors. Last year, several batches of a critical biologic drug at a manufacturing facility were lost to opportunistic bacterial contamination. To eliminate future batch rejections, plant engineers installed automated sensor arrays that monitor nutrient consumption rates in real time. The engineers claim that this system will prevent future bacterial contamination losses because early detection of abnormal nutrient consumption allows immediate, targeted anti-microbial treatment before bacteria proliferate. Which of the following, if true, most strongly supports the plant engineers' claim?

A commercial fruit exporter plans to introduce low-concentration ozone gas injection into its long-distance refrigerated shipping containers to prevent mold decay in bananas during transit. Skeptics argue that ozone exposure can accelerate fruit ripening and softening by triggering ethylene production. The exporter claims that using ozone gas will successfully extend the saleable shelf life of the fruit upon arrival at distant ports without causing premature softening. Which of the following, if true, provides the strongest support for the fruit exporter's claim?

In City X, municipal health officials observed that residents living in neighborhoods with a high density of full-service grocery stores report significantly lower rates of cardiovascular disease than residents in neighborhoods served primarily by fast-food outlets and convenience stores. To reduce the citywide incidence of cardiovascular disease, the city council proposes offering tax incentives to attract full-service grocery stores to underserved neighborhoods. The council reasons that increasing physical access to fresh produce will prompt residents to adopt healthier diets, thereby directly lowering their risk of cardiovascular illness.

Which of the following, if true, provides the strongest support for the city council's reasoning?

Analysis of sediment cores from a lake adjacent to a Bronze Age settlement reveals a sudden, steep decline in oak tree pollen accompanied by a dramatic increase in grass pollen around 1200 BCE. Archaeologists conclude that the settlement's inhabitants deliberately cleared the surrounding oak forests to expand agricultural land for crop cultivation. However, several paleoclimatologists contend that a regional shift toward severe aridity during the same period caused the natural die-off of the oak trees. Which of the following, if true, most strengthens the archaeologists' conclusion?