Figure: Comparing Long-Run Equilibriums Price, cost, marginal rexenue Pc = MCC (a) Long-Run Equilibrium in Perfect Competition Qc MC ATC -D= MR = Pc Quantity Price, cost, marginal revenue (b) Long-Run Equilibrium in Monopolistic Competition PM MCM QM MR D MC ATC Quantity Use Figure: Comparing Long-Run Equilibriums. Which statement is true? Firms in the market structure shown in panel (a) cannot have profits in the long run, but those in panel (b) can. Both panels show markets that have few interdependent firms. Both panels show markets that produce identical products. Both panels show markets that have many firms