Which of the following is an argument of Arthur laffer, the supply side economist

Which of the following is an argument of Arthur Laffer, the supply-side economist? O a. That present tax rates are too low and should be increased. O b. That an increase in tax rates will force people to work harder. O c. That a cut in tax rates will lead to higher tax revenues. on O d. That present tax rates are too high but a cut in tax rates will lead to a drop in tax revenues