A Monopolistically Competitive Firm Is Currently Producing 20 Units of Output

A monopolistically competitive firm is currently producing 20 units of output and charging $30 per unit.The marginal revenue of the 20^th unit produced is $12 and the marginal cost of producing the 20^th unit is $18.To maximize profit or minimize loss,the firm should:

A) Charge more and sell more output
B) Charge less and sell more output
C) Charge more and sell less output
D) Charge less and sell less output
E) Charge $30 per unit and sell less output