Use the Following to Answer Questions Below

Use the following to answer questions below

-Refer to the graph of unit cost curves 2. If the market price is 70, then a profit-maximizing competitive firm with these short-run unit cost curves

A) will earn an economic profit equal to $40.
B) will earn an economic profit equal to $30.
C) will earn an economic profit equal to $210.
D) will earn an economic profit equal to $280.