B : along with them not being able to vote most could not find jobs any were and would have to move to the north to work the factories
"Berlin is located in the Northern European Lowlands (North German Plain) along the Spree river in eastern Germany<span>. It lies within the state of Brandenburg."
hope this helps!:)</span>
It is hard to say without looking at your source (textbook or article if you have one associated with this question) but in the most recent studies, it has been Islam.
US embargo on trade--Germany used unrestricted submarine warfare in World War I as a means to cut off trade to and from Great Britain during the war.
Because so much of the US's trade was with Great Britain and they had claimed neutrality, the US was not happy to have their trade interrupted by Germany. The continued unrestricted submarine warfare led to the US stopping trade with Germany. This gave Germany more reason to be hostile toward the US and when they decided to continue despite embargoes and warnings, they sought the alliance of Mexico in what Germany thought would be eventual war with the US. <span />
