The Figure Given Below Shows the Revenue and Cost Curves

Multiple Choice

The figure given below shows the revenue and cost curves of a firm. MC represents the marginal cost curve, AC the average cost curve, MR the marginal revenue curve, and AR the average revenue curve.Figure 9.4

-Under perfect competition, at the profit-maximizing level of output:

A) price is greater than marginal revenue.
B) price is equal to marginal revenue.
C) marginal revenue is equal to zero.
D) the marginal revenue curve is upward sloping.
E) the average revenue curve is upward sloping.