Us federal income tax is progressive by law, but which best explains why wealthy individuals can often pay far less in taxes than the top tax rate? a. high-income earners can fight in court for the right to a reduced rate. b. high-income earners reduce their tax rates through numerous deductions. c. high-income earners use tax laws to their advantage to reduce their tax rates. d. high-income earners always place their assets overseas to lower their tax rates.