During World War I, what happened to Paris?
A) The French troops built trenches around the city that caused the Germans to get lost.
B) The addition of the U.S. troops fighting with the French army saved Paris from the Germans.
C) The U.S. troops forced the German troops to move back so that the United States could claim Paris.
D) The Black Hands assassinated the Archduke of Austria-Hungary and fled to Paris.