请教GWD-3-Q28

bdx2010

C/E两个选项没能区分开来，请NN指教~~谢谢啦~~

GWD3-Q28:

The coyote is one of several recent ecological success stories:  along with the white-tailed deer, the moose, and other species that are enlarging their natural domains, they have established themselves as supreme adapters in an era when the capability to adjust to the environmental changes wrought by human beings has created a whole new class of dominant large mammals.

A.    they have established themselves as supreme adapters in an era when the capability

B.    they have established themselves as being supreme adapters in an era when being able

C.    it has established itself as a supreme adapter in an era when to be able

D.    it has established itself as being a supreme adapter in an era when its ability

E.     it has established itself as a supreme adapter in an era when the ability

bdx2010

来帮帮忙嘛

sunny8843

看后面，...has created 所以需要ability做主语