They’ve won their last three matches.________ I find a bit surprising actually.

问题描述:

They’ve won their last three matches.________ I find a bit surprising actually.
A.that B.when
C.what D.which
应该选哪一个呢?我选的C答案显示不对,为什么?

中间应该是逗号,然后选D!
你看他选项都是小写啊,我觉得句号是印错了!