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.Diminishing marginal productivity of labour is first observed when the firm changes the amount of labour hired from

A) 0 to 1 unit.
B) 1 to 2 units.
C) 2 to 3 units.
D) 3 to 4 units.
E) 4 to 5 units.