By the time American troops entered World War 1 the Allies were exhausted after years of fighting. The correct option among all the options that are given in the question is the third option or option "c". The entry of Americans in the war boosted the morale of the Allied army. I hope the answer comes to your help.
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.
