What is the relationship between a perfectly competitive firm's marginal cost curve and its supply curve? O A. A firm's marginal cost curve is equal to its supply curve for all prices. O B. A firm's...

Economic

Extracted text: What is the relationship between a perfectly competitive firm's marginal cost curve and its supply curve? O A. A firm's marginal cost curve is equal to its supply curve for all prices. O B. A firm's marginal cost curve is upward sloping with twice the slope of its supply curve. OC. A firm's marginal cost and supply curves are horizontal lines equal to the market price. O D. A firm's marginal cost curve is equal to its supply curve for prices above average variable cost. O E. A firm's marginal cost curve is equal to its supply curve for prices above average total cost.