If an Item Is Displayed for Sale in a Store

Multiple Choice

If an item is displayed for sale in a store, when has an offer been made and when has it been accepted?

A) The vendor makes the offer by displaying the goods; the customer accepts it by putting an item in his basket or otherwise taking possession of it.
B) The vendor makes the offer by displaying the goods; the customer accepts it by paying for an item at the cash desk.
C) The customer makes the offer by presenting an item at the cash desk; the vendor accepts it by checking the goods out and taking payment.