Lincoln mentions the Declaration of Independence but discusses none of its specific passages. This is most likely because

The correct answer to this open question is the following.

You forgot to include the options. However, we can comment on the following.

Lincoln mentions the Declaration of Independence but discusses none of its specific passages. This is most likely because "he is not sure whether the references to inalienable rights imply that slavery is wrong."

Historians have documented that Lincoln had his doubts about the issue of slavery.

President Abraham Lincoln expressed many comments and concerns in his address, after rejecting the claim of the state of South Carolina to secede. The two basic ideas that Lincoln expressed were that the US Constitution was not violated by the controversies created and that if there were any controversies, the Constitution did not include something specific to resolve them. That is why the majority rule had to be the best way to resolve these issues.