In the short run, the competitive firm’s supply curve is the portion of the marginal cost curve that lies above the average variable cost curve?

• A. Upward-sloping portion of the average total cost curve
• B. upward-sloping portion of the average variable cost curve
• C. portion of the marginal cost curve that lies above the average total cost curve.
• D. entire marginal cost curve.
• E. portion of the marginal-cost curve that lies above the average variable cost curve