The answer is C. Because William Jennings Bryan who was heavily supported by populist during the election of 1896 said something about this during his "Cross of gold speech".
The Confederacy saw themselves as fighting a second war for independence. They were rebelling against what they felt was an oppressive government that was infringing on their rights.
Lincoln referenced the forefathers in his Gettysburg Address and felt that keeping the union together was what they had fought for, they created a new nation, not one that should be torn apart.
