In a general sense, World War I and World War II were wars conducted on a massive scale unlike any other wars in history. They were similarly caused by nationalism, imperialism, alliances, and militarism. Both wars saw countries trying to upset the power balance in Europe for their own gain.
Ethnicity is like your culture. Language, race, and religion all play into your background and culture. However, politics are something that govern the country you live in -- they're not necessarily connected to your background. Therefore, politics would be the correct answer.
I only remember 2 wasn't it the president James Madison and Jefferson Repuplicson
One result of the collapse of the Western Roman Empire was the Byzantine Empire lost control of North Africa. The correct answer is D.
