The answer is B I believe
The title of Lincolns plan for the south recovery from the war was, "Reconstruction."
Veto Laws, command the armed forces, and convene or adjourn congress
The economy of the South declined because it lost much of its slave labor force.
The Emancipation Proclamation is an executive order placed my Abraham Lincoln that did not abolish all slavery but it said to have helped lead the way.
Yes, it is true that although the Spaniards were brutal and vicious toward the Native Americans, the biggest killer of the native peoples was disease, since the Natives were not immune to the diseases that Europeans brought with them.