确认一道语法JJ

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

答案是E 对么?

为什么不选D? D错哪里?请NN指教

"the rate of mainstream American businesses failing" sounds awkward

"the failure rate for..." is a better way to say