If a Monopolistically Competitive Firm Is Earning Profits in the Short

If a monopolistically competitive firm is earning profits in the short run, the entry of competing firms into the market will:

A) shift the firm's demand to the right.
B) shift the firm's demand to the left.
C) cause price to drop, but will not affect the firm's demand curve.
D) cause price to rise, but will not affect the firm's demand curve.