What takes the approval of two thirds of the congress and three-fourths of the states?

C. Changes or amendments to the constitution

Explanation:

The Constitution provides that an amendment may be proposed either by the Congress with a two-thirds majority vote in both the House of Representatives and the Senate or by a constitutional convention called for by two-thirds of the State legislatures.

i actually think that the correct answer is: the roman senate power's could not exercise complete control over the common people or plebeians.

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