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.
The idea of manifest destiny greatly helped shape the U.S. governments's policies of land acquisition, since this held that the US was "destined" to expand from the Atlantic Ocean to the Pacific--meaning that the US embarked on a series of wars with Mexico and confrontations with Natives that helped the settlers move west.
I think it is A B and C, but I am not completely sure, it might be B, C, and D.
I don’t believe this question truly applies to any of the candidates, but I would have to go with Andrew Jackson. Jackson won the popular vote and had the most total votes, but John Adams still won in electoral college. Therefore Jackson would be your answer because he received the most votes but failed to gain the majority of the electoral college.
Have a nice day.