Before you quit your job,____ how your family would feel about your decision.

考察句子构成.
Before you quit your job是时间状语从句,那么后面的,____ how your family would feel about your decision一定是一个主句.
在所给的选项当中,BCD三个选项都无法和how引导的从句构成句子
只有A可以和how从句构成祈使句.
供参考.how 引导的是个什么从句呢？宾语从句，作consider的宾语。