​This is no-smoking zone.Can't you see the sigh?Sorry,

​This is no-smoking zone.Can't you see the sigh?Sorry,I_______it.
This is no-smoking zone.Can't you see the sigh?Sorry,I_______it.
A.haven't seen B.won't see C.don't see D.didn't see
请问选A和选D有什么区别,我感觉两个都可以,