Marie Antoinette owns a bakery and on July 15, she offers to sell Louis XVI, her best customer, 20 cakes for $50. Marie tells Louis XVI to send her a letter informing her if he would like to purchase the cakes. Louis XVI mails his rejection on July 17 and it arrives on July 20. Louis calls Marie on July 18 and inquires about the cost for three dozen cupcakes. When is the rejection effective? July 20 July 17 July 15 O There is not any rejection because he called about the cupcakes. July 18