请教 OG178

mjiirggh

178. In the last few years, the number of convicted criminals given community service sentences, which allow the criminals to remain unconfined while they perform specific jobs benefiting the public, have risen dramatically. (A) sentences, which allow the criminals to remain unconfined while they perform specific jobs benefiting the public, have (B) sentences, performing specific jobs that benefit the public while being allowed to remain unconfined, have (C) sentences, performing specific jobs beneficial to the public while they are allowed to remain unconfined, have (D) sentences which allow them to remain unconfined in their performing of specific jobs beneficial to the public has (E) sentences allowing them to remain unconfined while performing specific jobs that benefit the public has key: E. The explanation says D is wrong because in their performing is wordy and imprecise. To me, while performing in E is no better than in their performing in D. Can someone shed some light on this question?

mary1

in their performing
有performance做名词形式，为什么要用 performing 的动名词呢？
while performing 是强调动作，在该用动词形式表达清晰准确的时候，改用名词来表达，ETS认为是笨拙的。注意体会本句的逻辑意思。