___ you were born?

A．Was it where that

B．It was where that

C．Where was it that

D．Where it was that

发生雪灾、沙害、水害、泥石流危及行车安全，（）接到报告后，立即封锁区间，通知工务部门处理；根据工务部门提供的运行条件，开通区间放行列车。（非正常办法第二章第二条）

A.车站调度员

B.本务机车乘务员

C.列车调度员

D.车辆乘务员