CLEP US History II

Answer: C - The federal income tax was established by the 16th Amendment in 1913. Various taxes on income had been enacted since the Civil War, but only by the Congressional passage of various acts. Those taxes were generally designed to be temporary and varied widely in rate and revenue application. The 16th Amendment established income tax as a permanent part of American life, with only marginal changes to policies and applications, though rates have varied widely over the years.