Which statement best describes the plight of Native American tribes at the end of the American Civil War? A. The Confederacy lost against the Union and failed to help the Native Americans who had signed treaties with them before the war, leaving them devastated. B. The Confederacy won the war against the Union, but refused to take responsibility for Native Americans who had signed treaties with them before the war, leaving them helpless. C. The Confederacy lost the war against the Union and went on to build a healthier and stronger relationship with the Native Americans who had signed treaties with them before the war. D. The Confederacy won the war against the Union, but most Native Americans had switched sides by then and were supporting the Union, leaving Indian Territory devastated.