It's raining heavily outside. He has to stay at home, ______? [ ]

A. has he

B. hasn't he

C. does he

D. doesn't he

根据《建筑施工碗扣式钢管脚手架安全技术规范》，拆除作业应从顶层开始，（）。

A.先拆连墙件

B.先拆扫地杆

C.逐层向下进行

D.严禁上下层同时拆除