Suppose a perfectly competitive firm's total cost of production (TC) is TC(q) = q3 - 12q2 +60q + 20, and the firm's marginal cost of production (MC) is MC(q) = 3q2 -24q+60 The firm's short-run supply curve is given by O A. P= 3q2 - 24q + 60 for prices above $34. O B. P =q2 - 12q+60+ 20 O C. p=q2 - 12q+60 for prices above $24. O D. P =3q2 - 24q + 60 for prices above $24. O E. P=q2 - 12q + 60 for prices above $12