If One Person Earns $20,000 Per Year and Another Person

If one person earns $20,000 per year and another person earns $80,000 per year,they both will pay the Social Security tax ______________________.

A) at the same average tax rate
B) but the poorer person will pay at a higher average tax rate
C) but the richer person will pay at a higher average tax rate
D) but it is impossible to calculate their individual average tax rates