A graph of Price, P, versus Quantity, Q, which shows a curved, upward-sloping line, M C, rising from about (1.3, 4.7) to (3.3, 20), and two curved lines, A V C and A T C, both decreasing at a decreasing rate, reaching a minimum, and then from that point increasing at an increasing rate. A T C lies above A V C at all quantities. Line M C intersects both curved lines at the minimum points. A horizontal drop line extends from P = 6, ending at the intersection of MC and A V C at Q = 2. A horizontal drop line extends from P = 13, ending at the intersection of M C and A T C at Q = 3. Refer to Figure 15-1. If the market price falls below $6, the firm will earn a. zero economic profits in the short run. b. negative economic profits in the short run and shut down. c. negative economic profits in the short run but remain in business. d. positive economic profits in the short run