The answer is B. This is because it was during the Great Depression.
Marx and Engels begin The Communist Manifesto with "A spectre is haunting Europe" because they wanted to warn the bourgeoisie and the elite class that their movement is strong and it is not going to stop until Europe is classless. Literary effect: the movement is mainstream. Political effect: the movement is powerful.
Secondary; The events are 100 years apart. There is virtually no chance of it being primary.
Answer:
was not our fight and until Germany declared unrestricted submarine warfare we had no reasons to enter it. Many historians feels that the U.S. entering the war was a bad idea and resulted in the pains of the rest of the 20th Century. That if they had stayed out