Which of the following does NOT accurately describe the calculation of federal tax payable for individuals?

A.

There are currently five federal tax brackets, with rates ranging from 15% to 33%.

B.

Progressive tax rates are applied to brackets (or marginal increments) of taxable income.

C.

The federal tax rates are marginal, meaning that once taxable income reaches the next tax bracket, all of the individual's taxable income is taxed at the higher rate.

D.

The federal tax brackets are indexed to the Consumer Price Index to account for inflation.