How did Lincoln's and Douglas's views about slavery and the future of the United States differ?

A. Douglas thought the outcome of the Dred Scott decision would
preserve the union, while Lincoln thought that the union could only
be preserved if the decision was overturned.

B. Douglas felt that slavery would start to divide the United States,while Lincoln felt that popular sovereignty would preserve the union.

C. Lincoln felt that slavery would continue to divide the United
States, while Douglas felt compromises would preserve the union.

D. Lincoln supported popular sovereignty to preserve the union, while Douglas thought compromises between northern and southern states would work.