A Year Ago, James Sold a Motor Bike to Jim

A year ago, James sold a motor bike to Jim, his best friend. At the time that the bike was sold, Jim was a minor. Jim is still making payments to James. Jim will be attaining the age of majority in a few months time. How should James protect himself?

A) Have Jim transfer the bike to a third party.
B) Get Jim to ratify the agreement.
C) Provide Jim with a statement of account.
D) Enter into another agreement with Jim.
E) Get a witness to witness the next payment that Jim makes.