The Table Given Below Shows the Output Supplied by a Firm

The table given below 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 _____. ​
Table 8.2
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A) 40 units and $35, respectively
B) 40units and $0, respectively
C) 0 units and −$50, respectively
D) 30 units and $25, respectively
E) 50 units and $30, respectively