When You Were in High School, Your Parents Were Concerned

When you were in high school, your parents were concerned that you would start smoking so they made you an offer. If you did not smoke a cigarette until you were 16 years old, they would give you $3,000 towards a new car. You comply with the terms of the deal but when the big day arrives, your parents surprise you with a new moped instead of the cash. You cannot let your friends see you on a moped so you sue your parents for the cash. Who wins?

A) You win because you accepted your parents offer through your performance.
B) Your parents win because you lacked the capacity to contract.
C) You win, but only if your parents do not void the contract.
D) Your parents win because you did not give them any consideration.