Which Statement Indicates That a Tax Is Regressive

Multiple Choice

Which statement indicates that a tax is regressive?  

A)  High-income people pay $5,000; low-income people pay $2,000. 
B)  High-income and low-income people pay $200 each. 
C)  High-income people pay 20 percent of their income in taxes; low-income people pay 10 percent of their income in taxes. 
D)  Both high-income and low-income people pay 10 percent of their income in taxes.