The figure to the right shows cost and demand curves for a monopolistically competitive producer Costs and of iced tea. revenue MC per case Based on the diagram, one can conclude that 22 ATC O A. the industry is in long - run equilibrium. 16 14 O B. new firms will enter the market. O C. some existing firms will exit the market. Demand O D. firms achieve productive efficiency. 11 1 .MR 22 24 30 38 Quantity (cases)