which of the following is considered a regressive tax?

A. state property taxes
B. federal income tax
C. county sales taxes
D. a flat state tax of 6%

The correct answer is C. county sales taxes. A sales tax is considered regressive because it takes a larger percentage of income from low-income individuals compared to high-income individuals. A flat state tax of 6% would also be considered regressive for the same reason. State property taxes and federal income tax are typically considered progressive taxes, as they are based on the ability to pay.