Strengthen

City official: Following the implementation of a new ordinance restricting construction and commercial noise after 10 PM in the downtown district, the number of reported property crimes in the district dropped by 20 percent. This reduction was likely caused by the quieter environment, which allows residents to more easily hear the sounds of forced entry or tampering, thereby deterring criminals who fear being reported.

Which one of the following, if true, most strengthens the city official's argument?

A comprehensive analysis of e-commerce behavior revealed that individuals utilizing virtual reality (VR) retail platforms make 40 percent more impulse purchases on average than those shopping exclusively via traditional mobile interfaces. From this observation, consumer psychologists deduce that the highly immersive nature of VR inherently degrades a shopper's self-regulation. Accordingly, they forecast that an industry-wide shift toward VR commerce will trigger a drastic escalation in impulsive buying across the general public.

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

Media Analyst: A popular streaming platform recently introduced a "skip credits" button. Data shows that subscribers who frequently click this button watch significantly fewer episodes per viewing session on average than subscribers who let the credits play out. Clearly, the physical act of interacting with the interface breaks the viewer’s narrative immersion, thereby prompting them to end their viewing session earlier.

Which of the following, if true, most strongly supports the media analyst's conclusion?

Below are four distinct logical arguments (Left) and four highly abstract premises (Right). Match each argument to the single premise that provides the most robust logical strengthening by identifying and patching a critical gap in the argument's reasoning.

A recent dietary survey found that individuals who regularly consume fermented foods, such as yogurt and kimchi, report significantly lower levels of daily stress than those who rarely eat such foods. Based on this correlation, nutrition researchers concluded that the specific probiotics prevalent in fermented foods actively reduce the body's physiological stress response.

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

A recent analysis of dental calculus from the skeletal remains of the ancient Zuri people, who lived in the isolated, arid canyons of the Xylos region 3,000 years ago, revealed significant traces of a unique psychoactive compound. This compound is naturally found only in the leaves of the Tethyan shrub, a plant species strictly native to coastal marshlands located over 500 miles away. Based on this discovery, anthropologists conclude that the ancient Zuri must have engaged in long-distance trade with coastal populations.

Which of the following statements, if true, would most strengthen the anthropologists' conclusion? (Select all that apply)

The city council is proposing to replace all existing streetlights with new LED models. The council argues that this switch will reduce the city's annual streetlight operating budget. Their sole evidence is that the new LED models consume 40 percent less electricity per hour than the existing streetlights.

Which of the following, if true, most strengthens the city council's argument?

A specific species of crop-destroying beetle in Region X recently developed resistance to the primary pesticide used to control its numbers. In response, farmers introduced a new species of wasp that preys exclusively on these beetles. Since the introduction of the wasps, the beetle population in Region X has declined by 40 percent. Therefore, the introduction of the wasp must be responsible for the recent decline in the beetle population.

Which of the following, if true, most strongly supports the argument?

Match each logical argument (left) with the piece of evidence (right) that most strengthens its conclusion.

Evolutionary Biologist: Fossils of the ancient mammal *Thalassocnus* reveal unusually dense, heavy bones. Some researchers contend this extreme density evolved as a defensive adaptation against blunt-force impacts from terrestrial predators. However, maintaining such bones requires an immense caloric intake rarely justified by defensive needs alone. Because dense bones drastically decrease buoyancy—a vital advantage for foraging aquatic plants in turbulent coastal waters—this skeletal density likely evolved primarily to facilitate underwater grazing rather than as a defense mechanism.

Which one of the following, if true, provides the strongest additional support for the evolutionary biologist's argument?

Below are four distinct logical arguments (Left) and four pieces of evidence (Right). Match each argument to the single piece of evidence that most directly strengthens its conclusion by addressing its specific logical gap.

Marine biologist: The newly discovered deep-sea sponge Cladorhiza ventis inhabits waters near hydrothermal vents. Unlike most deep-sea sponges, C. ventis entirely lacks the internal canal systems and pores required for filter-feeding on suspended organic matter. Furthermore, the surrounding water is nearly devoid of the zooplankton that carnivorous sponges typically prey upon. Consequently, it is highly likely that C. ventis relies exclusively on symbiotic chemosynthetic bacteria for its nutritional needs.

Which of the following statements, if true, would strengthen the marine biologist's conclusion? (Select all that apply)

The Vendean people, who inhabit a harsh, densely forested mountain region, have a language containing over fifty distinct words for different types of moss. In contrast, neighboring lowland groups have only three such words. A linguist argues that this linguistic disparity exists because the Vendeans' specific environment forced them to develop a highly specialized moss vocabulary for survival, as they utilize various mosses for crucial medicinal and dietary purposes.

Which of the following, if true, provides the most support for the linguist's argument?

Researchers compared musicians who frequently improvise to those who exclusively play written music, finding that the improvisers have significantly greater neural density in the prefrontal cortex, a region associated with rapid decision-making. The researchers concluded that engaging in musical improvisation causes structural brain changes that enhance decision-making skills. Consequently, educational policymakers argue that incorporating improvisation into school music programs will improve students' ability to make rapid decisions in novel situations.

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

Entomologist: The Corvid butterfly population in the Aral Valley has plummeted over the last decade. Concurrently, there has been a sharp increase in the invasive thread-wasp, a predator of Corvid caterpillars. Nevertheless, the butterfly's decline is almost certainly due to a newly introduced agricultural herbicide, not the wasp. The herbicide, while directly harmless to the insects, accumulates in the soil and severely stunts the milkweed plants that Corvid caterpillars rely on exclusively for food.

Which one of the following, if true, most strengthens the entomologist's argument?

To investigate the effects of the amino acid taurine, researchers placed laboratory mice on a diet completely devoid of it, adding the synthetic filler Zylotol to maintain identical caloric intake. These mice soon exhibited severe cognitive decline compared to a control group on a standard diet. The researchers concluded that taurine deficiency directly causes cognitive impairment. A critic countered that Zylotol’s mild neurotoxic properties actually caused the observed decline. Nevertheless, the researchers maintained their original conclusion.

Which of the following, if true, most strongly supports the researchers' original conclusion in light of the critic's objection?

To alleviate severe traffic congestion, the metropolitan government of Meridia implemented a 'congestion charge'—a substantial toll levied on any vehicle entering the central business district during designated peak commuting hours. One year after the policy's implementation, the total volume of vehicles entering the district during these peak hours had decreased by 25 percent. City officials declared the policy a resounding success. However, critics point out that during the same year, a severe national economic downturn caused a 25 percent drop in office employment within Meridia's central business district. The critics argue that the economic downturn, not the congestion charge, was responsible for the traffic reduction. The city officials reject this criticism, maintaining that the congestion charge was indeed the primary driver of the decreased peak-hour traffic.

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

Marine biologist: In the coastal waters of Mako Bay, the overall density of kelp forests has decreased by nearly 30% over the past five years. During this exact same timeframe, the population of purple sea urchins, which aggressively graze on kelp, has doubled. It is clear that the surging purple sea urchin population is responsible for the decline of the kelp forests.

Which of the following, if true, most strengthens the marine biologist's argument?

Below are four distinct causal arguments and four potential pieces of evidence. Pair each argument with the single piece of evidence that most effectively bolsters its specific conclusion by addressing an underlying logical vulnerability.

Agronomist: The crop yields of farms in the Delta region have increased by 20 percent since a new soil-aeration technique was introduced three years ago. The developer of this technique claims that it improves nutrient absorption, directly causing the surge in yields. However, this claim is incorrect; the true cause of the increased yields is the unusually favorable rainfall pattern the Delta region has experienced over the same three-year period.

Which of the following, if true, provides the strongest evidence to support the agronomist's conclusion?