The Communist government of the USSR a. prevented travel to and from the USSR

c. controlled the spread of information

b. controlled the spread of ideas

d. all of the above

Answer;

d. all of the above

Explanation:

The Communist government of the USSR help to prevented travel to and from the USSR and they as well help to controlled the spread of information which simply means information are been kept and treated as confidentiality by them.

Lately they help to effectively controlled and as well managed the spread of ideas because they tend to believe that their ideal should only be know to them alone without any third.partt knowing about the ideaa