Which of the following statements is true?
(A) The MC curve of a profit maximizing firm must increase and cuts its MR curve from above at the firm's maximum output
(B) The MC curve of a profit maximizing firm lies below its MR curve then rises and cuts its MR curve from below at its profit maximizing price and output levels
(C) The MC curve of a profit maximizing firm must decline and cuts its MR Curve from above at the firm's profit maximizing output level
(D) none of the above