Robert, a minor, buys a stereo from Jane for $200. State law allows a minor to disaffirm contracts within a reasonable time after turning 18. Robert disaffirms the contract the day after turning 18 and returns the stereo. a. This contract was a valid contract, Robert cannot disaffirm. b. This contract was a voidable contract, Robert can disaffirm. c. This contract was a void contract. d. This contract was unenforceable because it needed to be in writing to be enforceable.