Which of the following led to the seemingly quick collapse of the USSR?

Question:
Which of the following led to the seemingly quick collapse of the USSR? 

1. Increasing dissent from the Polish union Solidarity

2.Gorbachev s abandonment of the Brezhnev doctrine

3.Failed attempts of Eastern European leaders to stem the tide of revolution in 1989 by installing new personnel

4. All of the above

Posted Date:-2021-07-30 09:38:57


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