The battle for which soviet city is viewed as an allied victory in a major turning point of the war

The Battle of Stalingrad is your answer

"The Battle of Stalingrad" was a battle fought in the Northwestern city of Stalingrad, in which throughout the "monthly (more like yearly) campaign, the Soviets held out against the German army, and won after the German troops ran out of supplies, and with inadequate equipment, they had to surrender.

~

c.

worked constantly and gave many sincere speeches about the importance of independence

a.   it resulted in widespread unemployment.