In Federal Courts When a Defendant Pleads Insanity

In federal courts when a defendant pleads insanity:

A) the burden of introducing evidence to prove insanity rests with the defendant.
B) to prevail in the case, the defendant must meet the affirmative burden of clear and convincing evidence.
C) the prosecution must prove sanity beyond a reasonable doubt in order to win the case.
D) answers a and b both state correct responses.