The Following Question(s)deal with the Gizmo Company, Which Has the Following

Multiple Choice

The following question(s) deal with The Gizmo Company, which has the following production function: $$\begin{array} { | c | c | } \hline \text { Number of Workers } & \text { Number of Gizmos Produced } \\\hline 0 & 0 \\\hline 1 & 10 \\\hline 2 & 19 \\\hline 3 & 26 \\\hline 4 & 31 \\\hline 5 & 34 \\\hline\end{array}$$
-The marginal product of the fourth Gizmo worker hired is

A) 10.
B) 5.
C) 3.
D) 12.
E) 1.