Which of the Following Would Cause an Increase in the Supply

Multiple Choice

Which of the following would cause an increase in the supply of cheese?

A) A decrease in the price of Vegemite (assuming that Vegemite and cheese are complements) .
B) An increase in the price of cheese.
C) An increase in the price of a product that producers sell instead of cheese.
D) An increase in the number of firms that produce cheese.