The Market for Footballs Is Perfectly Competitive

The market for footballs is perfectly competitive.If all else is held constant and the price of leather decreases,we would expect that the equilibrium quantity of footballs would:

A) fall and the equilibrium price would rise.
B) rise and the equilibrium price would fall.
C) fall and the equilibrium price would fall.
D) rise and the equilibrium price would rise.
E) fall and the equilibrium price would remain constant.