A drought has made this year's tomato harvest smaller than usual. What will probably happen to the overall supply of tomato sauce?
A: The supply will probably go up.
B: The supply will probably go down.
Since the tomato harvest was smaller than usual, tomatoes will be harder to get. Because tomatoes are a resource for making tomato sauce, tomato sauce will be harder to make. So, the supply of tomato sauce will probably go down.