The correct answer is:
A. Some employees in certain states do not pay state income taxes.
This is true as there are states (like Florida and Texas) that do not have a state income tax.
The other statements are incorrect: B. Employers are generally required to withhold taxes from an employee's paycheck. C. Every employee does not pay the same tax rate for federal taxes; tax rates vary based on income and filing status. D. The Social Security tax rate is 6.2% of income (as of my last knowledge update in 2023), not 5.3%.