Use the Following to Answer Question 358 -(Table: Linda's Copy Shop Production)Use Table: Linda's Copy Shop Production

Use the following to answer question 358: $$\begin{array}{l}\text { Table: Linda's Copy Shop Production }\\\begin{array} { l c } \hline \begin{array} { l } \text { Quantity of } \\\text { Variable Input } \\\text { (units) }\end{array} & \begin{array} { c } \text { Quantity of } \\\text { Output } \\\text { (copies) }\end{array} \\\hline 0 & 0 \\1 & 100 \\2 & 200 \\3 & 350 \\4 & 450 \\5 & 525 \\\hline\end{array}\end{array}$$
-(Table: Linda's Copy Shop Production) Use Table: Linda's Copy Shop Production.Linda's production runs into diminishing returns to her variable inputs when she employs the _____ unit.

A) second
B) third
C) fourth
D) fifth