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From 1914 to 1916, as World War I raged in Europe, Americans were not able to remain neutral in thought as well as action mainly because
1. United States membership in military alliances required the nation to fight
2. United States newspapers encouraged a policy of imperialist expansion
3. the warring powers interfered with the United States right to freedom of the seas
4. President Woodrow Wilson supported the war aims of Germany and Austria-Hungary
3. the warring powers interfered with the United States right to freedom of the seas