Everyone participating in the early sociological study committed a crucial methodological error by failing to fully consider alternative ways of classifying their data.
(A) by failing to fully consider alternative ways of classifying their
(B) by failing fully to consider alternative ways of classifying their
(C) they failed to consider alternative ways to classify their
(D) by not fully considering alternative ways to classify the
(E) by not considering fully alternative ways of classifying his or her
Solution (Posted on Jan 26th):
Solution (Posted on Jan 26th):
The best choice D says the date and not their data(indicating that the participants had to classify data about themselves). The phrase - his or her only makes the error deep, moreover, not preferred on GMAT S.C.
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