The correct answer is B. The election of a Republican president will be seen by Southern states as a compromise on slavery.
Step-by-step explanation
Based on the passage above, it can be predicted that "the election of a Republican president will be seen by Southern states as a compromise on slavery" because it is stated that John Brown, who stood out for his ideals of abolition during the American Civil War and tried to start a slave revolt (supporting ideas by Republicans and abolitionists). On the other hand, the Southern states were in favor of slavery, because this area concentrated the largest slave labor force, so it would be an attack against slavery to elect a Republican president. So, the correct answer is B. The election of a Republican president will be seen by Southern states as a compromise on slavery.