Use the Figure Below to Answer the Following Question(s)

Multiple Choice

Use the figure below to answer the following question(s) .
Figure 4-10
-Refer to Figure 4-11. On the Laffer curve shown, which of the following is true?

A) Tax revenue would increase if marginal tax rates were lowered from point C.
B) Tax revenue would decrease if marginal tax rates were lowered from point A.
C) Tax revenues are maximized at a tax rate corresponding to point B.
D) All of the above are true.