content area Part 1 Which of the following statements about the one-price rule is correct? Part 2 A. The one minus price rule is the reason marginal revenue is less than price for price makers. B. According to the one-price rule, firms agree on the price they will charge. C. The one-price rule says that firms must only charge one price for all units sold. D. According to the one-price rule, marginal revenue equals the price for price takers