Which of the following contributed to the collapse of communism in Europe?
A. The high cost of the arms race weakened the Soviet economy.
B. Mikhail Gorbachev allowed less political and economic freedom than previous leaders.
C. Cold War tensions increased between the United States and the Soviet Union.
D. The Soviet Union refused to agree to an arms control agreement.
PLEASE ONLY ANSWER IF YOU KNOW THE ANSWER FOR SURE!!!
