If Firms in a Perfectly Competitive Market Are Making an Economic

Multiple Choice

If firms in a perfectly competitive market are making an economic profit,new firms will enter.This entry shifts the market

A) demand curve leftward, and the market price falls.
B) demand curve rightward, and the market price rises.
C) supply curve leftward, and the market price rises.
D) supply curve rightward, and the market price falls.
E) none of the above.