Consider the total cost and revenue curves shown below, for two perfectly competitive firms, Firm A and Firm B. Short description: Two graphs labeled firm A and firm B. Long description: In each graph, the horizontal axis represents the quantity and the vertical axis represents dollars. The first graph representing firm A shows two increasing S-shaped parallel curves representing TC and TVC and an increasing line representing TR. TVC and TR begin at the origin. TC begins at a point, a little above the origin on the vertical axis. The second graph representing firm B shows two increasing S-shaped parallel curves representing TC and TVC and an increasing line representing TR. TVC and TR begin at the origin. TC begins at a point, a little above the origin on the vertical axis. TR intersects TC and TVC at two points, each. FIGURE 9-5 Refer to Figure 9-5. Given its total cost and revenue curves, Firm B should a. maximize its profits by producing that level of output such that the slope of the TC curve is equal to the slope of the TR curve. b. exit the industry. c. maximize its profits by producing that level of output such that