D Question 20 3.94 pts Price MC ATC $1.00 $0.95 $0.85 $0.60...... MR D 0 300 500 900 1000 Quantity The monopolistically competitive firm represented in the graph above is in: O short-run equilibrium because price exceeds average total cost at the profit-maximizing output level. both short-run and long-run equilibrium because price equals marginal cost at the profit-maximizing output level. both short-run and long-run equilibrium because price exceeds average total cost at the profit-maximizing output level. O long-run equilibrium because economic profits are zero at the profit-maximizing output level