A Purely Competitive Firm's Short-Run Supply Curve Is

Multiple Choice

A purely competitive firm's short-run supply curve is

A) perfectly elastic at the minimum average total cost.
B) upsloping and equal to the portion of the marginal cost curve that lies above the average variable cost curve.
C) upsloping and equal to the portion of the marginal cost curve that lies above the average total cost curve.
D) upsloping only when the industry has constant costs.