One of the Reasons That Communism Failed in the Soviet

One of the reasons that communism failed in the Soviet Union is that,under communism:

A) no one had a property right,so there is little incentive to use resources efficiently.
B) there were high rates of unemployment and homelessness accompanied by a high rate of inflation.
C) planners did not have all the information necessary to make efficient decisions.
D) there was a high degree of political freedom.
E) there was a high degree of economic freedom.