Which of the following provides the clearest statement of the Ricardian equivalence theorem? a. The finance of government spending with additional debt is essentially the same thing as finance with higher taxes because the larger debt implies higher taxes in the future. b. A 10 percent reduction in tax rates will reduce tax revenues by 10 percent. c. When additional debt is used to finance a tax cut, the lower taxes and higher interest rates will exert an equivalent impact on aggregate demand. d. Both an increase in government expenditures and a reduction in taxes will provide a substantial stimulus for aggregate demand.