The Following Data Show the Total Output for a Firm

Multiple Choice

The following data show the total output for a firm when specified amounts of labour are combined with a fixed amount of capital.When answering the questions,you are to assume that the wage per unit of labour is $25 and the cost of the capital is $100.
TABLE 7-4
-Refer to Table 7-4.Marginal product of labour begins decreasing with the ________ unit of labour hired.Average product of labour begins decreasing with the ________ unit of labour hired.

A) 4th; 3rd
B) 3rd; 2nd
C) 2nd; 3rd
D) 3rd; 4th
E) 4th; 5th