i am not happy because i found my mother _______ my things yesterday

问题描述:

i am not happy because i found my mother _______ my things yesterday
A looking though
B is looking though
C was looking
D looked for
该选哪个?为什么?

A
分词作状语为什么不选B?因为前面已有谓语动词FOUND
另外,主句是一般过去时FOUND, 从句要用相应的过去时( B 是现在进行时)