Facts: A promises B that if B doesn't break any state or federal laws before he is 21 he will give B $5,000. B turns 21 and has not broken any state or federal laws. What best describes B's legal position with respect to enforcing A's promise to pay?

1.) A has made a promise; therefore, he must keep it.

2.) B is under a preexisting duty not to break the law; therefore, he has given nothing of value that would constitute valid consideration for A's promise

3.) Because this is not governed by the UCC B's consideration is sufficient to find the promise enforceable

4.)A doesn't have to enforce his promise because B was a minor when he entered into the agreement