Which of the following statements is correct regarding profit-maximizing firms in the long run? OA. In monopolistic competition, firms produce more than the output at which average total cost is minimized. B. In monopolistic competition, firms produce less than the output at which average total cost is minimized. C. In perfect competition, firms produce an output at which price is greater than marginal cost. OD. In perfect competition, firms produce an output at which price is less than marginal cost.