To make changes to the U.S. Constitution, the Congress and the states must approve an amendment. In what proportions must the Congress and the states vote in favor of an amendment for it to become law?
1. three-fourths in the Senate, three-fourths in the House of Representatives, three-fourths of the states
2. two-thirds in the Senate, two-thirds in the House of Representatives, three-fourths of the states
3. three-fourths in the Senate, two-thirds in the House of Representatives, three-fourths of the states
4. two-thirds in the Senate, two-thirds in the House of Representatives, one half of the states