Table 83 -Refer to Table 8

Multiple Choice

Table 8.3
$\begin{array}{cc}\begin{array}{c}\text { Quantity } \\\text { of Output }\end{array} & \begin{array}{c}\text { Total } \\\text { Cost (\$) }) \end{array} \\\hline 0 & 50 \\10 & 85 \\20 & 150 \\30 & 220 \\40 & 305 \\50 & 455\end{array}$
-Refer to Table 8.3,which shows the output supplied by a firm and its total cost of production.If the market price is $8.50,the profit-maximizing output and profit are _____

A) 40 units and $35, respectively.
B) 40 units and $0, respectively.
C) 0 units and ?$50, respectively.
D) 30 units and $25, respectively.
E) 50 units and $30, respectively.