on saturday, jean offered to sell her trail bike to henry for $250. henry said he was not interested in buying a used trail bike. on tuesday morning, henry told jean that he had changed his mind and had a check in his wallet made out to her for $250. is this a valid acceptance of jean's offer? a. yes, the acceptance contains the same terms as the offer. b. yes, so long as henry had not received a revocation between saturday and tuesday. c. yes, by offering jean what she asked for, henry has revived the original offer. d. no, this is a counteroffer, and as the offeree, jean is free to accept or reject it.