I'm pretty sure it's A, but I'm sorry if I'm wrong.
Answer:
A coup d'état is a sudden overthrow of the government.
Nationalism is loyalty or devotion to one's country.
Balance of power is the idea that countries are safest when no one is more powerful than the rest.
The event that led to Napoleon's downfall was the invasion of Russia.
The Congress of Vienna was the peace conference that ended the Napoleonic Wars.
Article 6, Supreme Law, refers to the Supreme Law of the Land.
It states,
"This Constitution, and the Laws of the United States which shall be made in Pursuance thereof; and all Treaties made, or which shall be made, under the Authority of the United States, shall be the supreme Law of the Land; and the Judges in every State shall be bound thereby, any Thing in the Constitution or Laws of any State to the Contrary notwithstanding."
Meaning that:
-the Constitution,
-the Laws of the U.S. (current, and future ones),
-Treaties that have been made or that will be made -
Are what make up the Supreme Law of the Land.
Yes, this is true. In brown vs board of education of Topeka, the case got a legal victory due to the fact that it wasn't separate but equal, as the girl had to walk 20 blocks - a few miles - to get to her school, as she attends a black school. white people were able to get to schools near them, which is totally unfair. so the supreme court said 'separate but equal' is unconstitutional.