Political changes are perhaps the most common way to enact change in a nation, because these changes almost always bring about social and economic changes.
I believe the correct answer is C
Answer:
the Declaration of Independence, which stated that governments derive their powers “from the consent of the governed,” and the Constitution.
The last one, trust me every other answer here is so totally wrong.
The Emancipation Proclamation freed slaves living in ten states that were still in rebellion. Slaves that were already in a state that was taken over before the EP were not freed. At the same time, all those freed slaves were enlisted in the Union Army. As a result, after some time black slaves and white citizens of the USA fought together against one enemy. No doubt, the Civil War united black and white people as well as reduced tensions existing among them. The majority of freed black slaves fought rather valiantly and earned the respect of whites. This promoted equality and eradicated some racial prejudices in the society.
:)