Seth, a Very Mature Looking 16 Year Old, Against His

Seth, a very mature looking 16 year old, against his parents' wishes, bought a motorcycle for $3,000 from Mike's Bikes. The contract called for 12 monthly payment of $250. After three months, Seth decided to cancel the contract. Which of the following statement is TRUE?

A) Seth's parents will be responsible for the balance of the payments.
B) Seth must return the motorcycle and is then entitled to a full refund of his money.
C) Seth must honour the contract because Mike honestly believed him to be over the age of majority at the time the contract was made.
D) Seth must return the motorcycle and is entitled to a refund of his money subject to some reasonable rental payment for the time the motorcycle was used.
E) Seth may not cancel the contract because he has used the motorcycle for three months.