How many states must ratify an amendment before it becomes law?
all
three-fourths
two-thirds
one-half

Three-fourths of the states must ratify an amendment before it becomes law.

Explanation:

The procedure for amending the Constitution is regulated by Article five of the Constitution of the United States of America. This establishes that, after the official proposal, a constitutional amendment has to be ratified by the legislatures of, or by conventions within, at least three quarters of the states.

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