Answer:
World War I was the key factor of the revolution, because it had killed most of Russia amry. Tsar's mistakes was another cause in the revolution. ... The army man were fed up and decided to leave Tsar. On March 8, 1917 the was a riot in Petrograd about food shortage and the war.
Explanation:
Answer: The government.
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If I am not mistaken I believe it is true.
