The correct options are
A German economy took a hit.
B Germany lost parts of its territory.
C It aided in the rise of Adolf Hitler.
The First World War had a crippling effect on Germany. The war reparations that Germany was expected to pay, severely affected the economy. It lost Alsace and Lorraine to France. The situation in Germany aided the growth of Adolf Hitler. The formation of the League of Nations was a consequence of the war but did not really have an effect on Germany.