Use the Following Table to Answer the Question Below: the Amount

Multiple Choice

Use the following table to answer the question below: The amount of total output produced from various combinations of labor and capital.
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