Use the Following to Answer Questions Below

Multiple Choice

Use the following to answer questions below

-Refer to the graph of demand and marginal revenue. If a profit-maximizing monopolist with a constant unit cost equal to $40 faces the demand curve plotted in the graph, then the monopolist's total profit

A) will be equal to $90.
B) will be equal to $70.
C) will be equal to $30.
D) None of the above is correct.