During the Progressive Era, support for a
graduated income tax was based primarily on the
(1) desire of corporations to reduce their taxes
(2) need to raise income from the lower classes
(3) belief that all people should be taxed the
same
(4) resentment over the unequal distribution of
wealth



Answer :

During the Progressive Era, support for a graduated income tax was based primarily on the "(4) resentment over the unequal distribution of wealth" among other things.