The answer is D, having to fight a two-front war.
The Schlieffen plan was the German strategy to quickly take out France so that they could focus all their troops on Russia.
American patriot soldiers were fighting against the stronger British soldiers with a stronger navy, better weapons, and more soldiers to fight. There wasn’t anything unfair, but the British had a leg up in the fight being the top of the top country in warfare.
America winning the war was a big upset for the British as they lost to their own territory.
Do u have a picture I can see or