There are nine of them, so ______ get into the car at the same t

There are nine of them, so ______ get into the car at the same time.
A、they may not at all
B、all they may not
C、they can’t all
D、all they can’t
【正确答案】：C
【题目解析】：all 一般要放在实义动词之前，系动词,情态动词后。因此此题中，all 要放在can't之后