Figure 13-8Refer to Figure 13-8.Which of the following statements is correct?

A. Average variable cost is declining for quantities less than B because marginal cost is lower than average variable cost.

B. Marginal cost is minimized at B because at that quantity, marginal cost equals average variable cost.

C. Marginal cost is rising for quantities higher than D because marginal cost is higher than average total cost.

D. All of the above are correct.