Select the Word or Phrase That Best Matches the Definition

Select the word or phrase that best matches the definition or example.
-Gorbachev's reform policy of openness,which permitted an unprecedented range of cultural and intellectual freedoms.Far from strengthening socialism and reviving a stagnant Soviet Union,the reforms led to its further weakening and collapse.

A) Russian Revolution (1917)
B) Bolsheviks
C) Lenin
D) Guomindang
E) Mao Zedong
F) Chinese Revolution
G) Stalin
H) building socialism
I) Zhenotdel
J) collectivization
K) Cultural Revolution
L) Great Purges/Terror
M) Anna Dubova
N) Cuban Revolution
O) Cuban missile crisis
P) Nikita Khrushchev
Q) Deng Xiaoping
R) perestroika
S) glasnost
T) Mikhail Gorbachev