The Short-Run Supply Curve of a Perfectly Competitive Firm

The short-run supply curve of a perfectly competitive firm

A) is equal to that portion of the short-run marginal cost curve that is above the average variable cost curve
B) is equal to that portion of the short-run marginal cost curve that is above the average total cost curve
C) is equal to that portion of the short-run average total cost curve that is above the average variable cost curve
D) None of the above is correct