Perp 2012 63 hard

happinessusie

Prep2012-Pack1-SC-063          VSC002550         hard

Naked mole rats form colonies of approximately twenty animals, each of which consists of a single reproductive female and workers that defend her.

A.   each of whichconsists

B.   with each of them consisting

C.   each colony consisting

D.   and eachofthem consist

E.   and eachcolony consisting

why C?..

I chose D because  

I think C has no verb

lfzlxm

C应该是个独立主格吧，然后D里each of 后面应该用单数