Question

In "The Battle of Blenheim," why are Wilhelmine's words "'twas a very wicked thing" ironic?

A.
She is stating the truth, though it contradicts what her grandfather says.

B.
She is afraid to hear more about the battle, though her grandfather wants to tell her.

C.
She does not understand what wickedness is.

D.
She does not believe what her grandfather has told her.

please help