I am having trouble with a question for an assignment, and wanted more clarity. Other things constant, a reduction in marginal tax rates will tend to increase aggregate supply because the lower taxes will increase a. savings, which will lead to lower interest rates, an increase in consumption, and an increase in aggregate supply. b. disposable income, which will induce an increase in consumption and aggregate supply. c. the attractiveness of productive activity relative to leisure and tax avoidance. d. business optimism, which will increase both investment and aggregate supply. I would choose c because coming from the suppliers point of view they would produce more as consumers are spending more. But I also agree with B. Any suggestions?