The correct answer is: A
because the treaty Treaty of Indian Springs was signed in 1825 (Treaty of Indian Sources), by which they yielded most of the territory of their tribe in the North American Georgia. That's why one of them, William McIntosh, was murdered by other creeks as a traitor in the same year.
On the other hand, the Civil War was a war (although Congress never issued a Declaration of War) in the United States from 1861 to 1865.