Table 72 -Refer to Table 7

Multiple Choice

Table 7.2
$$\begin{array} { c c } \text { Labor } & \begin{array} { c } \text { Total Froduct } \\\text { (pairs of shoes) }\end{array} \\\hline 0 & 0 \\1 & 20 \\2 & 50 \\3 & 75 \\4 & 80 \\5 & 75\end{array}$$
-Refer to Table 7.2,which shows labor and the quantity of shoes produced by a firm.What is the marginal product of the third unit of labor?

A) 45 pairs of shoes
B) 25 pairs of shoes
C) 15 pairs of shoes
D) 75 pairs of shoes
E) 50 pairs of shoes