我做错了还是答案错了?I found -------very easy to learn English well if

我做错了还是答案错了?I found -------very easy to learn English well if
（接上）you put your heart into it.
Athat B it's C it D this,可我觉得应该选B,found后面是一个宾语从句,it's引导一个形式主语,而if you.it是条件状语从句.选C的话缺少谓语,所以答案错了,我的理解对否?