He was told that he was ________ to inquire into the cause of th

He was told that he was ________ to inquire into the cause of the accident.
A、posted
B、assigned
C、sent
D、placed
【正确答案】：B
【题目解析】：assigned 分配；post 公布；send 发送；place 放置；原意：他被告知他被派去调查事故的原因。因此B 符合题意。