— ______ did you see a cat run from behind the door?

— As soon as I entered the room.[ ]

A. What

B. When

C. Where

D. Why

临汾市煤炭产量监控系统中规定煤矿企业因停产、改造、检修等原因超过（），应当立即书面形式上报县煤炭工业局及县监控调度室。