Answer:
The correct answer is option (c) The new Russian government pulled all troops from the war, creating a troop deficit on the allied front.
Step-by-step explanation:
The effect he fall of the Russian Empire have on the allied war effort during World War I was when when Lenin took in charge, he took them out of world war 1, this resulted in a civil war.
The impact of them leaving the war affected Germany greatly, who only has to fight a one-front war, which was now France and it's Allies.