The Mail or Telephone Order Merchandise Rule of 1993 established all but which of the following key guidelines regarding mail and telephone orders?
a) Sellers must ship items within the time promised.
b) The seller must pay the total cost of shipping and handling associated with a mail or telephone order.
c) If the seller cannot ship the item within the promised time, the seller must notify the customer in writing and offer an opportunity to cancel.
d) If a customer decides to cancel the order, the seller must refund the customer's money within a specified period of time.