Answer:
It was good that America intervened, it's the main factor that ended World War 1. It was internationally and domestically good because if Germany were to win, it could cause future problems for the USA and all of Europe.
The detrimental was the signing of the Treaty of Versailles, which imposed harsh treaties on Germany which led to World War 2. That war affected everyone around the world.
Answer: Nationalism can lead to political conflict that if someone from a different country has pride in their country but someone doesn't like that country that the other person has, this can cause political conflict and wars.
Explanation: For example, in a historic time person A likes and has pride in country A. Person B disagrees and likes and has pride in country B. If person A and B doesn't agree with either country A or B, it can result in political conflict and cause war. Either person A wins or person B wins.
I’m pretty sure the answer is B
