Answer:
A. The Soviet army had more soldiers than the German army, and
German soldiers were not prepared for the harsh Russian winter.
Step-by-step explanation:
While the Germans had better preparation and organization in Operation Barbarossa and managed to get just 18 miles away from Moscow, there simply was not enough German equipment and manpower to breakthrough. The harsh Russian winter, notorious for stopping Napoleon, made it a logistical nightmare for the Germans to supply their soldiers and many ran out of food, fuel, and ammo, and many starved and froze due to lack of proper winter equipment. The German line was brutalized by the manpower and winter of the Soviet Union and became soft enough for the Soviets to run the Germans all the way back to Berlin