Which of the following conditions are true when a firm is maximizing its profits?
A. when a firm is maximizing profits revenue gained from the next unit sold equals zero.
B. press space to open selling additional units will reduce profits.
C. press space to open total number of units sold is maximized.
D. press space to open revenue gained from the next unit sold equals the cost of producing it.
E. press space to open total revenue is maximized.