MegaCorp. discriminates against Joe, an African-American, and fires him improperly. Joe files a lawsuit against MegaCorp. on the basis of employment discrimination. During pre-trial investigation, MegaCorp. discovers that Joe made material misrepresentations on his employment application. This after-acquired evidence of Joe's wrongdoing is:
a. not a defense that MegaCorp. can raise at any time.
b. a defense that shields MegaCorp. entirely from liability for employment discrimination in this case.
c. evidence that can be introduced at court only by Joe.
d. at best only a limitation on the amount of damages for which MegaCorp. is liable.