After the civil war, which amendments to the u. s. constitution offered african americans the most hope for achieving full citizenship rights? a. the twentieth, twenty-first, and twenty-second amendments b. the fifth, sixth, and seventh amendments c. the first, second, and third amendments d. the thirteenth, fourteenth, and fifteenth amendments

- three-quarters or two-thirds..

- "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."

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(1)representation based on state population (2)all states have equal representation apex