问一题语法JJ

T-4-Q22

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

据说此题是本月JJ，但未给出答案，大家看看选什么？我选D