The long-run supply curve of a perfectly competitive firm
A. Is equal to that portion of the long-run marginal cost curve that is above the relevant short-run average variable cost curve
B. Is equal to that portion of the long-run marginal cost curve that is above the relevant short-run average total cost curve
C. Is equal to that portion of the long-run average total cost curve that is above the relevant short-run average variable cost curve
D. None of the above
Answer: Option B

Join The Discussion