Answer the Question on the Basis of the Following Information

Multiple Choice

Answer the question on the basis of the following information for Manfred's Shoe Shine Parlor.Assume Manfred hires labor,its only variable input,under purely competitive conditions.Shoe shines are also sold competitively. $\begin{array}{c}\begin{array}{c} \text {Units of}\\\underline{\text {Labor}}\\0\\1\\2\\3\\4\\5\\6\\7\end{array}\begin{array}{c}\text {Total}\\\underline{\text {Product}}\\0\\14\\\\30\\35\\39\\\\44\end{array}\begin{array}{c}\text {Marginal}\\\underline{\text {Product}}\\\\14\\10\\\\\\\\\\2\end{array}\begin{array}{c}\text {Total}\\\underline{\text {Revenue}}\\\\\$ 42 \\\\90\\\\117\\126\\132\end{array}\end{array}$
Refer to the given data.What is the marginal product of the sixth worker?

A) 2 units.
B) 3 units.
C) 4 units.
D) 5 units.