Use the Following Figure to Answer the Questions

Multiple Choice

Use the following figure to answer the questions :
Figure 7-2 shows the total product curve for different levels of a variable input,labor.
-When the quantity of labor employed lies between points D and E in Figure 7-2:

A) marginal product reaches a maximum and then declines.
B) marginal product reaches a maximum and then becomes negative.
C) total product is increasing at a decreasing rate.
D) total product is decreasing.