Which of the following statement about the firm's short run production cost is FALSE:

• A.If marginal product exceeds average product, then average product is increasing.
• B.If marginal product is less than average product, then average product is decreasing.
• C.If marginal product equals average product, then average product is at its maximum.
• D.Average product is the change in total product that results from a one-unit increase in the quantity of labor employed.