Which Situation Describes Consensual Sex Rather Than Rape

Which situation describes consensual sex rather than rape?

A) A husband forces vaginal sex when he comes home intoxicated from a party. The wife objects.
B) A woman's lover pleads with her to have oral sex. She gives in but later regrets the decision.
C) A person is beaten, robbed, and forcibly subjected to anal penetration by an assailant.
D) A dentist gives anesthesia for a procedure and then has intercourse with the unconscious patient.