Answer:
B. The German army exhausted all of their supplies.
Step-by-step explanation:
The Battle of Stalingrad was considered to be the turning point of the eastern front in World War II in favor of the Soviets. Prior to the Battle of Stalingrad, the Wehrmacht had been taking Soviet ground, and Hitler wanted to take the city because of its symbolic value. The battle taking place in winter ensured that German supply lines deteriorated.