Compared to a Perfectly Competitive Industry in Long-Run Equilibrium,an Industry

Compared to a perfectly competitive industry in long-run equilibrium,an industry under monopoly

A) may realize economic profits in the long run.
B) may sustain losses indefinitely and still remain in business.
C) actively encourages competitors and thereby increases profits.
D) continues to expand until profits are reduced to zero.
E) can sell at a price below average variable cost and earn economic profits.