It was raining heavily.Little Mary felt cold,so she stood ______ to her mother.

It was raining heavily.Little Mary felt cold,so she stood ______ to her mother.
It was raining heavily.Little Mary felt cold,so she stood ______ to her mother.
A.close B.closely C.closed D.closing
这题的正确答案是D.我想知道为什么这道题不选close而要用closing呢?thank you very much.
我并没有故意给一个错误答案来考大家的英语能力。而是那份卷子上面附的答案就是选D。