The correct option is: "C. Joseph Stalin "
Stalin did not invent anything in terms of repression, he simply continued with the Bolshevik work where Vladimir Lenin left it, whose successful coup d'etat in 1917 was followed by the creation of the "Extraordinary Commission of struggle against sabotage and counter-revolution", commonly known as Czech.
From 1930 the so-called Great Purge or Great Terror of Stalin was unleashed. Hundreds of thousands of members of the Soviet Communist Party, socialists, anarchists and opponents were persecuted, tried and, finally, banished, imprisoned or executed in gulags concentration camps.
