Frank owes Jim $1,000. Frank contracts with Danylo to pay the $1,000 and notifies Jim of the contract by e-mail. Jim replies by e-mail that he agrees. After Frank receives Jim’s reply, Danylo and Frank send Jim an e-mail stating that they have decided to rescind their contract. Jim’s rights under the contract

a. vested when Jim learned of the contract and demonstrated manifest assent to it.

b. vested when Frank and Danylo formed their contract.

c. will not vest because Danylo and Frank rescinded their contract.

d. could never vest because Jim is an incidental beneficiary.