Moe's Sweaters Is a Firm in Perfect Competition

Moe's Sweaters is a firm in perfect competition. Moe's customers don't know who the firm's workers are. If Moe is the only employer in the market who discriminates against women by paying them less than he pays to equally qualified men, his firm will

A) lower its labor cost and receive a greater economic economic profit than its competitors.
B) receive a positive economic profit while its competitors will only receive a normal profit.
C) not maximize its economic profit and will not survive.
D) be able to lower its price and undercut the competitors.