29. Use the list below to answer the question. One Method of Amending the U.S. Constitution - Three-quarters of the states' legislatures ratify the proposed amendment. - An amendment is added to the U.S. Constitution. Which statement BEST completes this list about amending the U.S. Constitution? A. A state governor proposes a constitutional amendment. B. The U.S. Supreme Court proposes a constitutional amendment. C. Two-thirds in both houses of the U.S. Congress support a proposed constitutional amendment. D. Two-thirds of those voting in a federal election support a proposed constitutional amendment.