For both the monopolist and the perfectly competitive firm, profit-maximizing output occurs at the point where the?

A. marginal cost curves cut the marginal revenue curve from below
B. marginal revenue curve cuts the marginal output from above
C. marginal cost curve intersects the X-axis
D. marginal revenue curve intersects the Y-axis

Correct Answer: Option A

A. marginal cost curves cut the marginal revenue curve from below