Question

article v of the u.s. constitution lays out the amendment process. after proposal, how does an amendment become part of the constitution?
three - fourths of the states legislatures must ratify the amendment.
the supreme court must declare the amendment constitutional for it to be ratified.
two - thirds of congress must ratify the amendment.
the president must sign the amendments for it to be ratified.

Explanation:

1. Regarding the amendment process of the U.S. Constitution, after an amendment is proposed, for it to become part of the Constitution, three - fourths of the states' legislatures (or three - fourths of state ratifying conventions, but the option here is about state legislatures) must ratify it.
2. The Supreme Court does not have the power to ratify amendments; its role is judicial review.
3. The two - thirds of Congress is related to the proposal of amendments (either two - thirds of both houses of Congress or two - thirds of state legislatures calling for a constitutional convention for proposal), not ratification.
4. The president has no role in the ratification of constitutional amendments as the amendment process is separate from the normal legislative process where the president signs bills.

Answer:

A. Three - fourths of the states’ legislatures must ratify the amendment.