Refer to the Following:
the Amount of Total Output Produced

Multiple Choice

Refer to the following:
The amount of total output produced from various combinations of labor and capital.

$$\begin{array}{l}     \text { Units of Capital }\\\begin{array} { c c c c c c } & & 1 & 2 & 3 & 4 \\\hline \text { Units } & 1 & 20 & 36 & 48 & 53 \\\text { of } & 2 & 38 & 68 & 88 & 94 \\\text { Iabor } & 3 & 53 & 94 & 122 & 133 \\& 4& 63 & 112 & 148 & 164 \\& 5 & 68 & 120 & 164 & 184\end{array}\end{array}$$
-If the amount of capital increases from 3 to 4 units, the marginal product of the fourth unit of labor

A) decreases by 3 units.
B) increases by 8 units.
C) increases by 5 units.
D) decreases by 12 units.
E) none of the above