Use the Following Figure to Answer the Questions : Figure

Multiple Choice

Use the following figure to answer the questions : Figure 7-1 shows the total product curve for different levels of a variable input,labor.

-Refer to Figure 7-1.A firm would choose to operate between points C and D because:

A) marginal product has already reached a maximum.
B) average product is rising over that range.
C) marginal product and average product are positive,but falling.
D) marginal product and average product are rising.