Unlike mainstream American businesses, more than half of which fail, the failure rate for businesses in the Amish community hovers around 5 percent.

A.      Unlike mainstream American businesses, more than half of which fail

B.      Unlike mainstream American businesses, in which the failure rate is more than half

C.      Unlike mainstream American businesses, where more than half of them fail

D.      While the rate of mainstream American businesses failing is more than half

E.       While more than half of mainstream American businesses fail

 答案选E 我选的是D ，why ?

可能是看到unlike 习惯性的想到对比一致性了吧，很容易被迷惑，我觉得D此处

主要在于没有E简洁，这里的while转折从句并要求一致性。从D E的用词就可以对比

看出，the rate .failing is more than half 太wordy and awkward，没有E来的清

楚，明了 !!