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Question Stats:
77% (01:10) correct 23% (01:24) wrong based on 292 sessionsOfficial Explanation
Split 1A: the first whether/if split. The scientists want to know, "was the procedure successful?" That is the content of what they want to know, the answer to that yes/no question. For the content of a yes/no question, the answer to which someone wants to know, we use "know whether." At the beginning of the underlined section, we need "whether," not "if." Only (A) & (B) have this correct.
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Hi Generic [Bot],
Here are updates for you:
ANNOUNCEMENTS
Tuck at Dartmouth
GMAT Club REWARDS
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