Bill Recently Borrowed $50 from Ricardo for a Couple of Weeks.Bill

Multiple Choice

Bill recently borrowed $50 from Ricardo for a couple of weeks.Bill, still short of cash, tells Ricardo, "I will wash and wax your car in exchange for the $50 I owe you." Ricardo tells Bill, "OK, that's great!" Ricardo's performance of his new duty will be:

A) a novation.
B) a satisfaction.
C) an accord.
D) a rescission.