Answer:
The principal cause of the war was whether or not slavery was to be expanded into newly acquired lands in the west. After Abraham Lincoln won the November 1860 presidential election on a platform banning further expansion of slavery, seven slave states declared their secession from the country to form the Confederacy.
Explanation:
C- The Germans wanted the oil from the Caucasus
The difference between a treaty and an executive agreement is a) a treaty does not need congressional approval while an executive agreement needs congressional approval. An executive order is defined as "an issue ordered by the president of the United States to help officers and agencies of the executive branch manage the operations within the federal government itself." A treaty is defined as "an agreement under international law entered into by actors of international law, namely sovereign states and international organizations."