The correct answer is C. Totalitarian
Step-by-step explanation
The Soviet Union was a socialist country that was created in 1922 and its main leader was Joseph Stalin who was characterized as a totalitarian leader because he imposed his political and social regime where freedom was radically restricted and the State exercised all power without restrictions even though there were different institutions in charge of monitoring their actions. The Soviet Union was characterized by being led by a political party that did not allow the existence of opposition parties. In addition, it promoted a mass movement in which it was intended to frame the entire society to form a new person in a perfect society. Finally, it was characterized by using political propaganda to exalt its leaders. According to the above, the correct answer is C. Totalitarian.