Which of the following statements is true for markets in which the demand curve slopes downward and the supply curve slopes upward?

a. As the size of the tax increases, tax revenue continually rises and deadweight loss continually falls.
b. As the size of the tax increases, tax revenue and deadweight loss rise initially, but both eventually begin to fall.
c. As the size of the tax increases, tax revenue rises initially, but it eventually begins to fall; deadweight loss continually rises.
d. As the size of the tax increases, tax revenue rises initially, but it eventually begins to fall; deadweight loss falls initially, but eventually it begins to rise.

c