Grandpa Calls Billy and Says,"I Want You to Have My

Grandpa calls Billy and says,"I want you to have my toy train set.I'll bring it by next week." Billy says that he would love to have it.Grandpa dies unexpectedly that afternoon,and in his will leaves everything to Alicia,Billy's cousin.Which is true?

A) Billy gets the train because of the agreement with Grandpa.
B) Billy gets the train because there was donative intent on Grandpa's part and he (Billy) accepted the gift.
C) Alicia gets the train because Grandpa had not yet taken the train to Billy.
D) Billy gets at least part interest in the train because Grandpa cannot treat his cousins unequally in his will.
E) Alicia and Billy now each have a half interest in the train because Grandpa and Billy owned the train as tenants in common at the time of Grandpa's death.