——_____ she can't find her keys?she'll be locked out all night.

问题描述:

——_____ she can't find her keys?she'll be locked out all night.
——You are right.I'd better call her to check if she's OK.
A.What about
B.What with
C.What if
D.What for
请说明一下原因

C
如果她找不到钥匙她该怎么办?她会被锁在门口整晚
我还是打个电话给她以确认她没事
WHAT IF这里表示如果----怎么办