X is obligated to procure and deliver 500 cases of "Puko" Beer to Y on April 2. X brought the cases to Y's place of business. Y rejected the goods. Three hours later, Y changes his mind and asks X to redeliver the goods. The most likely result would be: (A) X must redeliver because the rejection was in good faith. (B) X does not have to redeliver because the first tender of performance served to discharge the obligation. (C) X must redeliver because a merchant is under an obligation to ensure acceptance. (D) X does not have to redeliver because of impossibility of performance