Question in-197
In 1974, Mexican chemist Mario Molina and US chemist F. Sherwood Rowland discovered that chemicals called CFCs were harmful to the ozone layer. Their research was extremely influential in the fight against CFCs. blank it laid the foundation for a 1987 treaty that phased out the use of CFCs across the globe.
Which choice completes the text with the most logical transition?
Regardless,
Specifically,
However,
Earlier,
In 1974, Mexican chemist Mario Molina and US chemist F. Sherwood Rowland discovered that chemicals called
Hard-difficulty · SAT Reading & Writing · Transitions — Example/clarification transitions (for example, namely). Read the question above, select your answer, and check the full explanation below to understand exactly why the correct choice works.
Answer explanation
Choice B is the best answer. "Specifically" logically signals that the information in this sentence—that Molina and Rowland’s research laid the foundation for a later treaty—provides specific, precise details elaborating on the previous sentence’s more general claim about the influence of the research.
Choice A is incorrect because "regardless" illogically signals that the information in this sentence is true despite the previous sentence’s claim about the influence of Molina and Rowland’s research. Instead, this information—that the research laid the foundation for a later treaty—provides specific details elaborating on the previous claim. Choice C is incorrect because "however" illogically signals that the information in this sentence contrasts with the previous sentence’s claim about the influence of Molina and Rowland’s research. Instead, this information—that the research laid the foundation for a later treaty—provides specific details elaborating on the previous claim. Choice D is incorrect because "earlier" illogically signals that the information in this sentence occurred at a time before Molina and Rowland’s research influenced the fight against CFCs. Instead, this information—that the research laid the foundation for a later treaty—provides specific details elaborating on the previous claim about the research’s influence.
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