He realized she was crying__ what he had said a,because b,because of 为什么,具体点,：】

He realized she was crying__ what he had said a,because b,because of 为什么,具体点,：】
He realized she was crying__ what he had said a,because b,because of 为什么,具体点,：】

He realized she was crying__ what he had said a,because b,because of 为什么,具体点,：】
B ,because 作为连词后面是一个完整的句子.what he had said 作为一个单词,作为宾语

b. because of
what he had said 作宾语

B because后加一句完整的句子，另一个加的是短语