Describe what happened during the Russian revolution. What became the official ideology of Russia?

Explanation:

Led by Bolshevik Party leader Vladimir Lenin, leftist revolutionaries launch a nearly bloodless coup d'État against Russia's ineffectual Provisional Government. Bolshevik Russia, later renamed the Union of Soviet Socialist Republics (USSR), was the world's first Marxist state.

i believe the answer is d.

it was the "4. potsdam" conference that demanded the unconditional surrender of japan, since it was clear that the japanese would continue to find until the very last man otherwise.