19. A monopolist maximizes profit A] where marginal revenue equals marginal cost B] where average revenue equals average cost [C] where price equals marginal cost [D] by charging the highest possible price on the demand curve.

19. A monopolist maximizes profit [A] where marginal revenue equals marginal cost. [B] where average revenue equals average cost. [C] where price equals marginal cost. [D] by charging the highest possible price on the demand curve.