because of what&because what的区别?

问题描述:

because of what&because what的区别?
She got angry ________ he said.
A.because B.because of that C.because what D.because of what
我选了C 请大人分析2者区别

because of 后面加的是名词构成介词型短语,because 后面直接跟句子,他是连词.what he said是名词