The Table Given Below Shows the Prices Charged and Marginal

The table given below shows the prices charged and marginal cost incurred by a monopolist for different units of the output. Table 10.3
What price will the profit-maximizing firm described in Table 10.3 charge, if the firm is earning a positive economic profit?

A) $1, 500
B) $1, 400
C) $1, 350
D) $1, 300
E) $1, 550