Donald, a Minor, Makes a Contract with Albert, an Adult

Donald, a minor, makes a contract with Albert, an adult, to buy a motorcycle. One week later, Donald has his eighteenth birthday and shortly thereafter tells Albert he will pick up the motorcycle next week. In this case:

A) Donald has expressly ratified the contract.
B) the contract must be renegotiated, because Donald was a minor when it was made.
C) Donald can change his mind and avoid the contract, because it was made when he was a minor.
D) the contract is void ab initio , because Donald was a minor at the time it was made.