I did not hear ___because there was too much noise where i was sitting

问题描述:

I did not hear ___because there was too much noise where i was sitting
A what did he say B what he said C what was he saying D what for him to say
请问选那一个,并给我讲讲为什么

B
这是个宾语从句,I did not hear是主句,后面的句子就应该用陈述句语气.