"子晕"发生的主要机制是

A．妊娠腹痛
B．异位妊娠
C．胎动不安
D．胎漏
E．小产

Speaker A: I wish you wouldn’t have your TV so loud.
Speaker B: ().

A. I think so too. I will follow your advice.

B. Sorry! Were you trying to sleep

C. Yes, I’m terribly sorry. I didn’t mean to disturb your study.

D. All right. I will turn it down.