At the age of 16 Marty contracted with Cream-of-the-Crop Cycles to purchase a motorcycle. Marty agreed to make monthly payments until the purchase price and interest are paid in full. If Marty disaffirms the contract:

The contract is voidable by Marty.

Explanation:

This is a voidable contract since minors are not allowed to engage in contracts unless they contain basic necessities, e.g. food.

US contract law considers that minors are not aware of the legal implications and obligations of a legal contract and therefore they cannot be held responsible for them. That is why the contract is voidable by Marty. The seller, Cream-of-the-Crop Cycles, should know that minors cannot sign contracts and unless Marty tricked them using a fake ID, there is not much to do.