He made another wonderful discovery ,___of great importance to science .A.which I think is.

问题描述:

He made another wonderful discovery ,___of great importance to science .A.which I think is.
B.which I think it is.C.which I think it.选哪一个?怎么译?

A
他又有一个棒极了的发现,我认为这个发现对于科学是很重要的.