The Thirteenth, Fourteenth, and Fifteenth Amendments all - extended voting rights to citizens.
- were ratified during the Civil War.
- faced little resistance from the nation.
- secured rights for African Americans.

Explanation:

known collectively as the Civil War Amendments,

they are best described as reliable search engines.

explanation:

the addition to geographic boundaries that might have  kept the people of the huang river civilization from traveling to far distance region is that they had learned about the other river valley civilizations but feared contact would bring invasion.

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