A Promise to Make a Gift

A promise to make a gift:

A) is not enforceable as a contractual duty.
B) is not enforceable, but can be voluntarily carried out.
C) is not enforceable, and if the promisor has actually completed the gift, a court will order the recipient to return the gift.
D) is enforceable as a contract.
E) is enforceable as a contract if the parties are related.