Out the Table and Answer the Question Below The Marginal Product of the Fifth Unit of Labor Is

Multiple Choice

out the table and answer the question below. $\begin{array}{c}\begin{array}{c}\text {Units of}\\\text {Labor}\\\hline1 \\2 \\3 \\4 \\5 \\6 \\7\end{array}\begin{array}{c}\text { Total }\\\text { Product }\\\hline ---\\---\\66\\---\\---\\78\\---\end{array}\begin{array}{c}\text {Average}\\\text {Product}\\\hline20\\---\\---\\---\\16\\---\\10\end{array}\begin{array}{c}\text {Marginal}\\ \text {Product}\\\hline---\\30\\---\\10\\---\\---\\---\\\end{array}\end{array}$

The marginal product of the fifth unit of labor is

A) 16.
B) 10.
C) 4.
D) -2.