Mary Promises to Give Her Car to Her Friend

Mary promises to give her car to her friend.The friend sells his current car for a fairly low price because he is expecting to get a nearly new car from his rich and generous friend,Mary.Mary changes her mind and decides to keep the car.If the friend sues Mary,the court most likely will:

A) Require Mary to give her friend the car because his sale of his car was consideration.
B) Require Mary to give her friend the car because Mary made an illusory promise.
C) Not require Mary to do anything because this was a gift promise.
D) Require Mary to pay damages to the friend for any loss he incurred in connection with Mary not keeping her promise.