The correct answer is A) America remaining neutral through most of WW1.
An example of Isolationism is "America remaining neutral through most of WW1."
That is a good example of isolationism.
At that time, the United States President, Woodrow Wilson, decided to maintain the foreign policy of neutrality and do not involve the United States in the European issues; in this case, World War I. That was his intention and the American citizens supported him.
However, there were some incidents that made President Wilson change his mind. Basically two: the interception of the Zimmerman telegram and the sinking of the Lusitania ship by the German Navy.
Those were major reasons for President Wilson to ask Congress for a declaration of war against Germany.
