A grocery store mails an offer to purchase 50,000 pounds of bananas to a produce importer. The importer immediately ships the 50,000 pounds of bananas by truck to the buyer but does not send notification to the buyer that it is making the shipment. Which of the following is true?

a. There has been an effective acceptance merely by shipping the bananas.

b. There would be an acceptance only if the seller sends a written acceptance by mail because the offer was received by mail.

c.The seller must send an acceptance to the buyer by any commercially reasonable method.

d. When the bananas arrive at the grocery store, their arrival will be treated as an offer.