$\backslash$table$[[\backslash$table$[[$Labor$],[($workers$)]],\backslash$table$[[$Total$],[$product$],[($units$)]],\backslash$table$[[$Marginal$],[$product$]],\backslash$table$[[$Average$],[$product$]]],[0,0,,],[1,,3,],[2,,,4\mathrm{.}5],[3,14,,],[4,,3,],[5,19,,],[6,,1,]]$

The above $($incomplete$)$ table provides information about the relationships between labor and various product measures. The amount of labor that maximizes the marginal product of labor is

A$)5$ units of labor.

B$)3$ units of labor.

C$)4$ units of labor.

D$)2$ units of labor.

$1$