An amendment can be proposed by either a two-thirds vote of both houses of Congress or by a constitutional convention called by Congress at the request of the legislatures in two-thirds of the states. The constitutional convention method has never been used to propose an amendment.
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A comparison study of the
abolition movement, the settlement-house movement, the temperance movement, and
the civil rights movement would most likely show that the united states has
experienced periods of social and political reform. The answer is number 4.