The police were seeking more information to find out ________ the rich merchant.

A．who was it that killed

B．who it was that killed

C．it was who killed

D．who was it killed

患者，女，25岁，G₁P₀，孕37周， * * 大量出血，胎心率正常，B超提示部分性前置胎盘。对本例最恰当的处理方法是

A．人工破膜
B．人工破膜，静滴缩宫素
C．输血，等待 * * 分娩
D．剖宫产术
E．人工破膜，用头皮钳牵引