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Suppose a perfectly competitive firm's total cost of production (TC) is TC(q) = q3 -8q2 + 30q + 20, and the firm's marginal cost of production (MC) is MC(q) = 3q- 16q + 30. The firm's short-run supply curve is given by O A. P= q- 2 - 8g + 30 for prices above $14. O B. P= q2 - 8q + 30 for prices above $24. O C. P=02 - 8q + 30 + 20 q O D. P= 3q2 - 16q + 30 for prices above $14. O E. P= 302 - 16q+ 30 for prices above $4