Answer:
D. The Entire German sixth army, considered the best German troops was lost is the correct answer.
Step-by-step explanation:
The battle of Stalingrad was the deadliest and largest battle in the second world war and was a turning point in the war. The German army was never quite able to recover from the defeat and number of soldiers lost. The battle took place between 1942 and early 1943. Due to months of fighting and starvation, the Germans announced their surrender on 2nd February, 1943. The fighting began when the German air force bombed Volga river and the city of Stalingrad. Nearly 750,000 German and 500,000 Russian soldiers died. the battle ended when all the units of German sixth army surrendered and it also proved the German army is not invincible.