Which Situation Constitutes Consensual Sex Rather Than Rape

Which situation constitutes consensual sex rather than rape?

A) After coming home intoxicated from a party, a person forces the spouse to have sex. The spouse objects.
B) A person's lover pleads to have oral sex. The person gives in but then regrets the decision.
C) A person is beaten, robbed, and forcibly subjected to anal penetration by an assailant.
D) A physician gives anesthesia for a procedure and has intercourse with an unconscious patient.