The answer is A, or It was a clear victory for the Northern states.
Explanation:
The Battle of Antietam stopped the Confederacy’s advance into the Northern territories. Because the North won a tough victory in this battle, the way was paved for the Emancipation Proclamation to be issued.
The Great Plains were one. They hunted elk, bison, antelope, and etc..
I think A, but I am not really sure.
