mathistrash12 mathistrash12 17-07-2018 History contestada The last step in ratifying an amendment to the U.S. Constitution requires A. a majority in a popular election vote in favor of the amendment B. three-fourths of the state legislatures vote in favor of the amendment C. two-thirds of both houses of Congress vote in favor of the amendment D. two-thirds of the Senate vote in favor of the amendment