-The Above Figure Illustrates a Perfectly Competitive Firm

-The above figure illustrates a perfectly competitive firm.If the market price is $10 a unit,to maximize its profit (or minimize its loss) the firm should

A) shut down.
B) produce between 10 and less than 30 units.
C) produce 30 units.
D) produce more than 30 units and less than 40 units.
E) produce 40 units.