Which of the Following Statements About Marginal Cost Is Correct

Multiple Choice

Which of the following statements about marginal cost is correct?

A) When the marginal product of a variable input is rising,the marginal cost will fall.
B) When marginal cost equals average cost,average cost is at its maximum.
C) In the short-run,the marginal cost curve is parallel to the average variable cost curve.
D) When marginal cost is falling,total fixed cost is rising.