To Maximize Net Benefits in the Table,it Is Most Appropriate

Multiple Choice

To maximize net benefits in the table,it is most appropriate to use:
$\begin{array}{|c|c|c|c|c|c|c|}\hline \begin{array}{c}\text { Control } \\\text { Variable }\end{array} & \begin{array}{c}\text { Total } \\\text { Benefits }\end{array} & \begin{array}{c}\text { Total } \\\text { Costs }\end{array} & \begin{array}{c}\text { Net } \\\text { Benefits }\end{array} & \begin{array}{c}\text { Marginal } \\\text { Benefit }\end{array} & \begin{array}{c}\text { Marginal } \\\text { Cost }\end{array} & \begin{array}{c}\text { Marginal } \\\text { Net Benefit }\end{array} \\\hline Q & B(Q) & C(Q) & N(Q) & \boldsymbol{M}(Q) & \boldsymbol{M}(Q) & M N B(Q) \\\hline 0 & 0 & 0 & 0 & -- & -- & -- \\\hline 1 & 900 & 100 & 800 & 900 & 100 & 800 \\\hline 2 & 1,700 & 300 & C & 800 & 200 & 600 \\\hline 3 & 2,400 & 600 & 1,800 & 700 & E & 400 \\\hline 4 & A & 1,000 & 2,000 & 600 & 400 & 200 \\\hline 5 & 3,500 & 1,500 & 2,000 & 500 & 500 & F \\\hline 6 & 3,900 & 2,100 & 1,800 & D & 600 & -200 \\\hline 7 & 4,200 & 2,800 & 1,400 & 300 & 700 & -400 \\\hline 8 & 4,400 & B & 800 & 200 & 800 & -600 \\\hline 9 & 4,500 & 4,500 & 0 & 100 & 900 & -800 \\\hline 10 & 4,500 & 5,500 & -1,000 & 0 & 1,000 & -1000 \\\hline\end{array}$

A) four units of the control variable, since the marginal benefit exceeds marginal cost.
B) six units of the control variable, since the marginal cost exceeds marginal benefit.
C) five units of the control variable, since net marginal benefits are zero.
D) None of the statements associated with this question are correct.