Select the correct option to test your answer: 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 Correct Answer: Option A (Is equal to that portion of the short-run marginal cost curve that is above the average variable cost curve) Verified correct option for Commerce (Economics).