The story refers to social problems.So a little child _____ not understand all that it talks about.

题目

The story refers to social problems.So a little child _____ not understand all that it talks about.
A.may
B.must
C.could
D.shall
请问是选C吗?如果不是那选什么为什么?

答案

我觉得选C有道理哈,表明小孩的理解能力还达不到理解社会问题的程度.