(i'll make brainliest) the constitution can only be amended in one of two ways outlined in article v. one method, that has not been used to date, requires the holding of a constitutional convention. what is required by the other method in order for an amendment to occur? a) the president must make the revision(s) and add his signature to the new document. b) three-fourths of congress must vote to ratify and it and the president must approve. c) two-thirds of congress, as well as three-fourths of state legislatures, must vote to ratify. d) the supreme court judges decide if amendments need to be made and must agree unanimously (100%) on changes.