The correct answer is C. Northerners would fight to keep America united.
Explanation:
The reality is that the Civil War did not start as a war on slavery, at least for the politicians and inhabitants of the North. For these, war was necessary to maintain the national unity of the United States in the face of the threat of secession from the southern states, who did believe that slavery was the main cause of the conflict. For this reason, President Abraham Lincoln did not refer to slavery or abolition in the first years of the war, since he knew that for many northerners this was not a relevant issue.
