问题详情

Which of the italicized parts functions as a subject？

A．It suddenly occurred to me that all are not thieves that dogs bark at.

B．She has made it clear that she will have nothing to do with him.

C．Our belief is that things will improve.

D．The fact remains that there is no filling station here.

请帮忙给出正确答案和分析，谢谢！