The Short-Run Equilibrium Position for a Firm in Monopolistic Competition

The short-run equilibrium position for a firm in monopolistic competition is the point at which:

A) price equals average variable cost.
B) marginal revenue equals rising marginal cost.
C) price equals marginal cost.
D) marginal revenue equals average revenue.
E) the firm's marginal-cost curve intersects its marginal-revenue curve from above.