Troy, a minor, sells his collection of sports memorabilia to Vern for $250. On his eighteenth birthday, Troy learns that the collection may have been worth at least $2,500. Troy
A.
can disaffirm, because the contract has not been fully performed.
B.
can disaffirm, if he does so within a reasonable time of attaining majority.
C.
cannot disaffirm, because he has already attained majority.
D.
cannot disaffirm, because the contract has been fully performed.