求各位英语达人帮我解决几道英语题！谢了！O(∩_∩)O~

.He realized she was crying( )what he had said. A.because B.because of C.as D.since B啊 看后面 she was crying because of what he had said. because of 后面要接名词 “.what he had siad“ 指 那些他说过的话 如果是用ACD，.He realized she was crying because/since