In a tort suit based on defamation, a defendant may not plead as a defense:

A. A conditional privilege if the defendant is a former employer asked by a prospective employer for information about the plaintiff's character.

B. A constitutional privilege if a defendant is a public figure

C. The truth of the defamatory statement even though it was uttered with malicious intent

D. An absolute privilege if the defendant is a witness called to testify about the plaintiff in a suit to which the plaintiff was not a party.