You Deliver the Final Payment of Rent to Your Landlord,Jimmy

Multiple Choice

You deliver the final payment of rent to your landlord,Jimmy.Because of a post office error,the money ends up next door at Fred's house.Fred refuses to give the money back.What action do you have against Fred?

A) Restitution because there is no contract between you and Fred,but he has been unjustly enriched
B) The court can order an injunction against Fred to return the money since there is an implied contract that has been enforced
C) Restitution because there is a contract between you and Fred and he has been unjustly enriched
D) The court can order an injunction against Fred to return the money since there is an expressed contract that has been enforced
E) You have no action against Fred and your only option is to repay your landlord