Answer:
Freedom of speech and press ( B )
Step-by-step explanation:
The important freedoms that were restricted were Freedom of speech and press. human rights were seriously restricted especially freedom of speech and press. censorship of speeches and report made by the press was seriously enforced during the soviet union era and this restricted the freedom of speech and press.
Right to violent revolt is not a freedom in any civilized world and the freedom to choose your country was not even available because the cause of a single state was been pursued by the communist party and they achieved this in most part of the existence of the soviet union.