Answer:
The correct answer is C. As a result of the Russian Civil War, Russia became the first communist nation.
Explanation:
The Russian Civil War was an armed conflict that took place between 1917 and 1923 in the territory of the dissolved Russian Empire, between the new Bolshevik government and its Red Army, in power since the October Revolution of 1917, and on the other side the military of the former Tsarist army, grouped in the so-called White Movement, composed of conservatives and liberals, favorable to the monarchy and closely related to the Russian Orthodox Church, as well as democratic socialists: revolutionary socialists and Mensheviks opposed to the Bolshevik revolution.
The most intense confrontations took place from 1918 to 1920, but the major military operations ended on October 22, 1922, when the Red Army occupied Vladivostok, previously occupied by the Provisional Government of Primorye. The last enclave of the white forces was the Ayano-Mayski district, on the Pacific coast, which did not capitulate until June 17, 1923.