The correct answer is Option A: because people of the world- including dissenters in Germany- has approved their cause.
Joesph Stalin justified the war of Soviet Union with Hitler's Germany because he believed that everyone was on his side. He believed the world had approved his cause to fight tyranny.
He also believed many Germans did not like Hitler and were also supportive of his cause.
We should not forget that the people of Soviet Union were already supporting Stalin.
The Cold War was a period of geopolitics tension between the Soviet Union and the United States and their respective allies.
The main way in which the separation of powers guards against tyranny is by making it impossible for any single branch to become too powerful, since each branch "checks and balances" the others out when it comes to making and enforcing legislation.
Well, both One Day in the Life of Ivan Denisovich and Gulag Archipelago did capture the harsh treatment in the Soviet prison camps.
Alexander Solzhenitsyn a Nobel prize winner was himself a gulag prisoner from 1945 to 1953, so his story was widely considered as an accurate depiction of everyday prison life in the gulags. Solzhenitsyn gave terrifying accounts of the working conditions for prisoners, such as working in an outdoor construction site in the deep winter without proper equipment or clothing. The book covered one of the cruelest and blackest moments of human history, it showed how wicked man could be to mankind, prisoners were made to work without food, and some were killed at any slight mistake. What makes it so pathetic was the murder of tens of millions of innocent Soviet citizens by their own Government, and it happened mostly during the rule of Stalin, from 1929 to 1953.
The French Revolution is important because it was a major change in government; it brought an end to absolute monarchy and a start to a representative government.