In what sense was the soviet war in afghanistan a prelude to the downfall of communism?
a. the soviet failure in afghanistan persuaded american policy planners that they could undertake anti-communist military actions without direct soviet opposition.
b. the failure of eastern european nations to support the soviet endeavor in afghanistan forced the soviet union to finance the entire war itself, thus harming its economy.
c. the difficulties of the afghan war showed the weakness of the soviet military and government, leading to popular disillusionment with the soviet system.
d. the afghan war took soviet troops away from eastern europe at a time when they were needed to suppress anti-communist, nationalist protest movements.