The correct answer is 2. Isolationism
Following world war 1, United States didn't want to mess with European affairs because they understood how bad the war was and didn't want to participate in it again. That's why when Wilson wanted to join the League of Nations they declined and the US remained on its own.
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It emphasized US economic strength. It emphasized US military strength. It promoted the strength of US scientists and inventors.
Answer:
B.) Fishing
The answer is b, or fishing.
Henry Ford created the first car