Sally Seller and her friend Brian Buyer were at lunch one day when Sally told Brian, "I decided last night I am going to sell my motorcycle for $800." Brian, who thought this was a deal he couldn't refuse, responded "I accept, I will buy your motorcycle for $800." Assume $800 was a fair price for the motorcycle. Which of the following assertions is true at the time of Brian's statement?
(A) Sally and Brian have entered into an enforceable contract and Sally is obligated to sell Brian her motorcycle for $800.
(B) Sally and Brian have not entered into a contract.
(C) Sally is an offeree with the power, but not the right, to enter into a binding contract with Brian to purchase the bike for $800.
(D) Both (B) and (C) are correct.