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.
The answer is C. There was concern that U.S. citizens' privacy was being violated.
The Answer is D) logs. A Corduroy road is also known as a log road or timber trackway made by placing logs, perpendicular to the direction of the road over a low or swampy area.