Answer: 3. the amendment receives a two-thirds vote.
When two-thirds of the members in the house of the senate agree that a section in the constitution should be amended, the other members cannot do anything about it. However, it is extremely difficult to get two-thirds of the Senate to agree on the same thing. That is why constitutions are not always amended. It takes a lot of time to get two-thirds of the members to agree on something. For that reason, these two-thirds are known as the supermajority.