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
答案是D
不過想瞭解一下從failing改成not是否有竄改原意之嫌?
另外,後方的介系詞究竟是該用to還是of?