Correct answer choice is:
C. Were exhausted after years of fighting.
The alliance lost the war as a result of they were exhausted, whereas the Allies still had fight left in them. However, the Germans were conjointly defeated on the battleground, that is that the dirty very little secret that is been unbroken out of the common historical narrative. The Germans organized their huge, final last-chance offensive to undertake and win the war before the American troopers entered into the front lines.