For a Perfectly Competitive Firm, the Short-Run Supply Curve Has

For a perfectly competitive firm, the short-run supply curve has an output level that is

A) determined by the lowest point on the average total cost curve.
B) determined by the point at which marginal cost equals marginal revenue.
C) determined by the lowest point on the average variable cost curve.
D) determined by the point at which average variable cost intersects the average total cost curve.