Answer:
D) a decrease in both the aged cheddar cheese and bread markets.
Step-by-step explanation:
A 10% income tax increase will shift the aggregate demand curve to the left, reducing total demand. This should affect both necessities and luxury goods.
In this case, the demand curve for both aged cheddar cheese and bread will shift to the left, reducing the total quantity demanded at every price level. This will result in a lower equilibrium price for both goods.