What is the correct answer and why are the other ones wrong?

E. decrease price 19. Which of the following statements relating to a profit-maximizing perfectly competitive firm is true? A. The firm is facing downward sloping demand and marginal revenue curves. enich off wolad B. The firm will raise its price to increase revenue. C. The firm's price is above its marginal revenue at every output level. O D. The firm's price is given by the market and is equal to marginal revenue. nollaubonq pizza X E. The firm continues to produce as long as marginal revenue is greater than zero. +2 - 2