Mandy is 16 years old. She wanted to buy a car but none of the dealers would do business with her. As a result, she arranged for her father to sign the contract with her for the purchase of the car. Her father is a sane, sober adult. After driving the car for three months, Mandy changed her mind and wished to return it for a refund. Can Mandy avoid the contract?

a. Yes since Mandy is 16 years old

b. No because Mandy's father is not a minor.

c. Yes, all contracts are voidable.