Jill became enraged at her brother, Jack, because he took credit for the Christmas gift that Jill bought for their mother. Jill took a knife from the kitchen and threatened to stab Jack if he did not clarify this falsehood to their mother and tell her that it was Jill who was actually responsible for the gift. To prevent Jill from stabbing him, Jack punched her in the face and ran away. Jill later sued Jack for battery relating to the punch in the face. Jack has received Jill's complaint and wants to allege that he punched Jill in self$-$defense to prevent her from stabbing him. When in the civil litigation process must Jack raise his affirmative defense?

Jack must rais the affirmative defense in a pretrial conference.

Jack must raise the affirmative defense in the motion for summary judgment.

Jack must raise the affirmative defense in the answer.

Jack must raise the affirmative defense in the motion for judgment on the pleadings.

Jack must raise the affirmative defense in the counterclaim.