The price of peanuts increases. At the same time, we see the price for Jelly rise. How does this affect the market for peanut butter?
a. The demand curve will shift to the left; the supply curve will shift to the left.
b. The demand curve will shift to the left; the supply curve will shift to the right.
c. The demand curve will shift to the right; the supply curve will shift to the left.
d. The demand curve will shift to the right; the supply curve will shift to the right.