mediumFPSCNTSCSSPPSCUSSR / Russia History
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Answer and explanation
Correct Answer: C: 1917
Explanation: The correct answer is C: 1917. The Russian Revolution occurred in 1917, with the February Revolution (overthrowing the Tsar) and the October Revolution (Bolsheviks seizing power under Lenin). The revolution led to the establishment of the Soviet Union in 1922.