Given the Table Below,diminishing Returns Begin with The A)1st Worker

Multiple Choice

Given the table below,diminishing returns begin with the $\begin{array}{cccc}\begin{array}{c}\text { Number of } \\\text { Workers }\end{array} & \begin{array}{c}\text { Total } \\\text { Product }\end{array} & \begin{array}{c}\text { Average } \\\text { Product }\end{array} & \begin{array}{c}\text { Morginal } \\\text { Product }\end{array} \\\hline 5 & -&28 & -\\10 & - & - & 30 \\15 & 420 & - &- \\20 & -& -&22 \\\hline\end{array}$

A) 1st worker.
B) 5th worker.
C) 10th worker.
D) 11th worker.
E) 16th worker.