Milk Can Be Used to Produce Cheese or Butter

Milk can be used to produce cheese or butter. If the price of a kilogram of butter rises, what happens to the supply of cheese?

A) The supply of cheese could increase, decrease or stay the same depending on what happens to the supply of butter.
B) The supply of cheese stays the same, and there is no change in the quantity supplied of cheese.
C) The supply of cheese increases.
D) The supply of cheese decreases.
E) The supply of cheese stays the same, and there is a decrease in the quantity supplied of cheese.