The correct answer is - The Soviet victory is considered a turning point in the war.
The Battle of Stalingrad was a long and very bloody one. It was a battle that was crucial for the outcome of the war, as if the Germans managed to win and got hold onto the oil in the Caucasus they were going to become stronger, plus one of the strongest forces, the Soviets, would have been eliminated. The Soviets though managed to win, and as they won the battle they immediately started moving toward Germany and pushing the German military back. That was a turning point in the war as the Germans were very weakened, surrounded on all sides, and the war came in their country instead of out of its borders, with the end result being a win of the Allies.