C: strong steel made it possible to build skyscrapers and suspension bridges
Answer:
During the American Civil War most tribes were divided between supporters of the Union and the Confederacy, providing soldiers for each army. ... When transcontinental railroads were built through Indian Territory and the settlement of adjoining states increased, the Five Civilized Tribes lost their independence.
Explanation:
C.)The confederacy under the Articles of Confederation is too weak.
