Help Please

Why does Cassie want to tell Mama about rejecting the books before Miss Crocker tells her?

A.
Cassie wants to tell Mama how Miss Crocker whipped her and Little Man.

B.
Mama won't punish Cassie as harshly if Cassie tells her first.

C.
Cassie thinks Miss Crocker doesn't understand the problem.

D.
Mama had told Cassie to reject the books if they were dirty.