请教GWD-20中的一道语法题，到底是with还是That？

bushitiancai

Q16:

The fact of some fraternal twins resembling each other greatly and others looking quite dissimilar highlights an interesting and often overlooked feature of fraternal-twin pairs, namely they vary considerably on a spectrum of genetic relatedness.

 

A.   The fact of some fraternal twins resembling each other greatly and others looking quite dissimilar highlights an interesting and often overlooked feature of fraternal-twin pairs, namely they vary considerably

B.   That some fraternal twins resemble each other greatly while others look quite dissimilar highlights an interesting and often overlooked feature of fraternal-twin pairs, namely that they vary considerably

C.   With some fraternal twins resembling each other greatly and others looking quite dissimilar, it highlights an interesting and often overlooked feature of fraternal-twin pairs, namely considerable variation

D.   With some fraternal twins resembling each other greatly and others looking quite dissimilar, it is a fact that highlights an interesting and often overlooked feature of fraternal-twin pairs, namely a considerable variation

E.    Because some fraternal twins resemble each other greatly and others look quite dissimilar, this fact highlights an interesting and often overlooked feature of fraternal-twin pairs, namely they vary considerably 

答案是选B。但是不能理解。还请各位NN解释一下为什么选C。另外，B选项为什么错，是With引导错了，还是It错误？请大家帮我解疑~~不胜感激

答案是选B。但是不能理解。还请各位NN解释一下为什么选C。另外，B选项为什么错，是With引导错了，还是It错误？请大家帮我解疑~~不胜感激

benny9200

Prep确认答案B。 C中it不能指代整个句子 所以没有指代对象