Federalism is the separation of state and national government's powers. One of the reasons that the Civil War occurred was over the debate of state vs. national powers.
Answer: B- there were many different competing ethnic groups.
Explanation:
I’m sure it is a documentary or journal but I would say documentary
To create a balance of power, those were all if the ideas of the groups.
Ex.
NATO,
North Atlantic Treaty Organization, keyword, treaty. It was all alliance between North America and other European countries.
Vienna wanted the balance of power during the wars.
So was the triple alliance and entente.