Which event decreased the soviet union's political power in the 1980s?
o
a. the united states made an impressive display of military power in
vietnam.
o
b. the alliance between the soviet union and china dissolved.
o
c. the soviet union intervened militarily in afghanistan.
o
d. the end of apartheid cost the soviet union its only ally in africa.

The Soviet Union intervened militarily in Afghanistan decreased the Soviet Union's political power in the 1980s

Option C

Explanation:

The soviet afghan war where the soviet union had tried to invade Afghanistan which had last for over nine years from 1979 to 1989 resulted in the success of the United Nations (with whom soviet union was in a cold war) who were in support of Afghanistan.

This led to a feeling of discontent and fueled up the disintegration of the soviet union. It also led to the spending of a huge amount of money on the military which resulted in the suffering of the growth of the economy.

your answer is rising unemployment and inflation.