The correct answer to this open question is the following.
Although there are no options attached we can say the following.
The nations that were under Soviet control, but still attempted reforms and pushed for their independence in the 1950s and 1960s were the following.
These nations were known to be the satellite states of the Soviet Union. The USSR wanted to have some buffer states or territories in case the western countries tried to invade it.
The satellite nations were Poland, East Germany, Czechoslovakia, Albania, Romania, Hungary, and Bulgaria.
All these states tried to get rid of Soviet control, however, just Romania could do it in 1958, Albania in 1960.
The other states got their liberation from the Soviet rule in 1991, after the end of the Soviet Union under the leadership of Russian leader Mikhail Gorbachev.