I believe the answer is It shows that Charlemagne conquered a huge part of Europe.
Charlemagne became the first man in history to conquer Western Europe since the downfall of the Roman Empire. Eventhough his empire was not as large as the Romans, His achievement still pretty much respected becuase many experts believe that the current France and England is the fragments of what used to be Charlemagne's empire.
He proposed that the federal Treasury take over and pay off all the debt that states had incurred to pay for the American Revolution.
The answer is D. The Germans wanted to knock out Russia with its slow moving army then they could focus all of their efforts on France
True, increased world competition is one way that farming in the United States changed in the late 1800s.