Analyzing Argument Structure and Boldface Roles

Public health officials recently claimed that a new vaccination campaign led directly to a 20 percent decrease in seasonal influenza cases this winter. However, data from regional health clinics indicate that the reduction in flu cases occurred almost entirely in counties where strict sanitation protocols were introduced simultaneously. While vaccinations certainly provide individual protection against virus strains, the dramatic overall drop in transmission was primarily driven by improved hygiene practices rather than the vaccine rollout itself.

Which of the following best describes the roles played by the two boldfaced portions in the argument above?

Economists traditionally argued that implementing tariff protection on infant industries inevitably undermines long-term domestic competitiveness by shielding firms from global market pressures. However, a comprehensive analysis of East Asian industrialization reveals that several key sectors achieved international dominance precisely during periods of heavy protection. These historical outcomes suggest that targeted state protection can foster competitive advantages when paired with strict export performance standards. Granted, protectionism often induces economic inefficiency when unconditioned; nonetheless, since conditional subsidies incentivized rapid technological adoption in these case studies, the conventional view regarding the uniform detriment of tariff protection requires substantial revision.

In the argument given, the two boldfaced portions play which of the following roles?

Paleontologists long hypothesized that the unusually dense, vascularized bone structure observed in the fossilized limb bones of Spinosaurus served primarily to provide ballast for underwater foraging. However, a recent biomechanical study demonstrated that several terrestrial archosaurs exhibited comparable bone density without engaging in aquatic habits. Therefore, this structural feature does not, by itself, demonstrate an exclusively aquatic lifestyle, though it remains consistent with semi-aquatic behavior when evaluated alongside cranial adaptations.

Which of the following statements accurately describe the rhetorical functions of the boldfaced portions in the argument? Select all that apply.

Conservationists have proposed introducing a controlled population of apex predators to a coastal nature reserve to curb the overabundance of herbivores. Critics of the initiative contend that the immediate predation will significantly reduce the populations of several endangered prey species in the reserve. However, ecological models indicate that without apex predators, hyper-herbivory will degrade the vegetative canopy completely, destroying the nesting habitat for those exact prey species within five years. Therefore, implementing the predator introduction program is essential for the long-term survival of the reserve's endangered fauna.

In the argument given, what are the respective roles played by the two boldfaced portions?

Proponents of urban transit reform advocate for making municipal bus and rail networks free of charge, contending that eliminating fares significantly reduces peak-hour traffic congestion by inducing drivers to abandon their personal vehicles. However, comprehensive empirical evaluations of municipal zero-fare initiatives demonstrate that the overwhelming majority of newly attracted transit passengers were previously pedestrians or cyclists, not automobile commuters. Therefore, the zero-fare strategy fails to achieve its primary environmental objective while simultaneously depriving transit systems of vital operational revenue. Consequently, city councils should reject zero-fare proposals and instead allocate budgetary reserves toward improving transit service frequency and reliability.

Which of the following best describes the roles played by the two boldfaced portions in the argument?

Ethologists long maintained that the intense, synchronized flashing of male fireflies in tropical canopies functions primarily as a cooperative signal to attract distant females to the group. However, recent high-speed video analysis demonstrates that individual males adjust their flash timing to obscure the flashes of adjacent rivals. Therefore, the collective synchronization is merely an unintended byproduct of relentless competition among individual males to monopolize female attention. Consequently, models that rely on group-level selection to explain this phenomenon are fundamentally flawed.

In the argument given, the two boldfaced portions play which of the following roles?

Marine biologists once theorized that the sudden proliferation of deep-sea glass sponge reefs off the Pacific coast was primarily driven by recent changes in ocean water temperature. However, this hypothesis overlooks crucial historical sedimentation data. High-resolution oceanographic core samples demonstrate that these sponge colonies have maintained stable growth cycles for over three millennia, regardless of thermal fluctuations. Because glass sponge structures rely on dissolved silica rather than temperature stability to construct their structural frameworks, the recent expansion is actually attributable to agricultural runoff that boosted coastal silica concentrations.

Which of the following statements accurately describe the structural function of the boldfaced portions in the argument above? Select all that apply.