Answer: B is correct.
Explanation: there were many who wanted to follow isolationism arguing that the war was problem of Europeans, there were also those (many Americans were of European origin with their roots in different corners of the Old continent). Situation changed and USA (country of European origin and roots) entered the war and continued engaged in (especially) European security policy.
Isaac Newton discovered the universal law of gravitation
Dwight eisenhower in 1952
Most of them wanted to be neutral but some wanted to side with the Confederates or the Union
