Which, if any, of the following statements is false regarding the history of the Federal income tax on individuals? The top marginal tax rate for individuals has never exceeded 35% The need for revenue to finance the war effort during World War Il converted the income tax into a mass tax (ie, a greater proportion of the U.S. population was subject to tax). It existed during the Civil War. The 16th amendment to the U.S. Constitution was ratified in 1913. O All of these statements are true statements