Answer: C. mass migration out of the area
Indian territory did not have much effect on the civil war, but the civil war had impact on Indian Territory except for migration out of the area.
Step-by-step explanation:
There were conflicts regarding the different ingenious tribes that were living in a certain part. It wad getting difficult for them to maintain their identity and there were quite some disturbance among the tribes.
American civilians didn't want them. They were forced out of their land and their traditional practices were in danger.