The Russian revolution of 1917 is a revolution led by Vladimir Lenin who was Bolshevik Party leader who launched a bloodless coup d'état against the Duma's government in Russia.
- The first process is that food shortage lead to popular uprising in Russia.
- The second process is that the Russian military refuses to put down anti government protests.
- The third process is that Cesar gave up control of Russia.
Therefore, the Option A is correct because it is the second process in the question.
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