This is an AP Microeconomics question:

Question 2(Multiple Choice Worth 2 points) (3.05 MC) A firm operating in a perfectly competitive market is earning normal profit, and its marginal cost equals its marginal revenue. Which of the following must be true in the short run? O An increase in output will increase profit. O A decrease in output will increase profit. O Its marginal cost is above its average revenue. O The firm's marginal cost exceeds its average total cost. O Any change in output will cause economic losses