Willie Gave His Girlfriend Reba a Gold Necklace for Her

Willie gave his girlfriend Reba a gold necklace for her birthday.The next day,Reba broke up with Willie and started dating his best friend,Waylon.Willie is furious and heartbroken.He becomes so upset that he commits suicide.Can Willie's estate get the necklace back from Reba?

A) Willie's estate can recover the necklace, because a donor is entitled to revoke or withdraw a gift within a reasonable period of time.
B) Willie's estate can recover the necklace, because Reba paid no consideration for the gift.
C) Willie's estate cannot recover the necklace, because it was a gift "causa mortis."
D) Willie's estate cannot recover the necklace, because it was an "inter vivos" gift.
E) This was not a gift, because Willie would not have intended to give Reba the necklace had he known about Reba and Waylon.