John is hired to kill Bobs wife, Mary by this yearend. John and Bob agree to the terms. John gets $10,000 upon shaking hands on the contract and $15,000 upon proof of Marys death. John receives the first $10,000 from Bob, and fulfills his obligation to Bob, by poisoning Mary. John waits for the second payment but he doesnt receive it and sues Bob. The courts decision:

a. awards John $15,000 plus legal fees.

b. Bob wins, proving the second payment did not have consideration

c. the contract required a writing

d. the contract has no legal purpose.