The federal government collected less in total individual income taxes in 1983 than in 1982.
Can we conclude that Congress and the president cut individual income tax rates in 1983?
A. No. It could be that the economy contracted, so less income was earned and less was paid in tax.
B. No. The tax rates might have stayed the same, but the process of collection may have changed.
C. Yes. Since the same number of people would be paying taxes, if tax collection was down, the tax rate must have been cut.
D. Yes. Since the same amount of income was earned, if tax collection was down, the tax rate must have been cut.