Answer: C is correct (Communism was coming to an end).
Explanation: In fact, Communism never took place (at least not in the way that Marx and his Soviet followers predicted). There is a big difference between Communism-ideology and Communism-regime. To bring idea down to earth has been always a problem for humans. In this case the problem was already a human being as conceived by Communists. Communism got incredibly popular (1. after the revolution in 1917 and 2. aftter the WW II) but since then illusionary part of all the story had been revealing itself...slowly. First revealing moment was 1956 in Hungary, then Prague Spring in 1968 and then Solidarity Movement in Poland in early 1980s. So called "Communism" (that never realized Communist ideas) was unable to work in reality, with real human beings.