Consider the Following Production and Cost Schedule for a Firm

Multiple Choice

Consider the following production and cost schedule for a firm.The first column shows the number of units of a variable factor of production employed by the firm.
TABLE 13-3
-Refer to Table 13-3.A profit-maximizing firm would never hire more than the ________ unit of this factor of production.

A) 3rd
B) 4th
C) 5th
D) 6th
E) 7th