SAT® Command of Evidence Practice Question: Explicit Comparison
Struggling to master SAT® Command of Evidence? Improve your score with this expertly-crafted practice question. Includes strategy tips and detailed answer explanations.
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Command of Evidence Practice Question
Researchers have been studying the effects of pollution on various aquatic ecosystems. One area of focus is the concentration of heavy metals like lead, mercury, and cadmium in different water bodies. The concentrations of these metals vary depending on the source of the water. For instance, industrial runoff (IR), urban drainage (UD), agricultural runoff (AR), and natural springs (NS) contribute differently to the metal concentrations. A study by environmental scientist Johan Millhouse revealed that the concentration of a given metal is typically higher in water bodies influenced by industrial runoff and urban drainage, due to higher pollution levels. For example, while the concentration of mercury in water from urban drainage is on average 50%, the concentration for ______.
Which choice most effectively uses data from the table to complete the example?