Minors in contract

A minor, unable to live at home, contracts to rent an apartment for one year at $600 per month. After living there for three months, he disaffirms the contract. The reasonable value of that apartment was only $500 per month. Assuming no rent has been paid, the minor must pay:
            a.       Nothing; the contract has been disaffirmed.
            b.       $1,800; the contract rate for three months.
            c.         $1,500; the reasonable value for three months.
            d.         $7,200; the contract rate for one year.
            e.         $6,000; the reasonable rate for one year