The two main reasons why Douglas opposed John Brown's plan to raid Harper's Ferry were that he was sure the plan would fall and lead to many black deaths, and he thought he would hurt the abolition movement by causing a backlash.
B most likely!! hope this helps
The Battle of Fort Sumter.
Coastline,rivers,and low elevation
The treaties were used to remove the Cherokee and other native American tribes from their lands by telling and persuading them that they would be moved to a better 'more civilized' place for new life opportunities.