20. Refer to Figure 5. In order to maximize its profit, the firm will choose to produce
(A) less than 100 units of output.
(B).100 units of output.
(C) between 100 and 133.33 units of output.
(D) more than 133.33 units of output.

1. 題目解析題目要求我們根據圖形（F...