This is the last question on my test, may someone please help me out with it?

In what way did political policies act as a centrifugal force in the Soviet Union during the late 1980s?

A. The government made strides to be more open with the people in the population, which improved communication.

B. The government gave the people more freedom to criticize the government, which led to nationalist movements.

C. The government decided to increase its nuclear arms development, which angered the citizens.

D. The government tightened its hold on the economy, which left many citizens unemployed.

E. The government made peace with the United States and its allies, which bolstered the economy.