Refer to the Information Provided in the Table Below to Answer

Multiple Choice

Refer to the information provided in the table below to answer the following question.
Table 7.3 $$\begin{array} { l l l l l l l } \mathrm { L } & 0 & 1 & 2 & 3 & 4 & 5 \\\hline Q & 0 & 10 & 20 & 30 & 40 & 50\end{array}$$
-Refer to the table above. Suppose output varies, ceteris paribus, with labor input in the following manner displayed above. After how many units of labor do diminishing returns set in?

A) 3
B) 4
C) 5
D) They do not set in.