What shows the role of ideology in state-building after October?

Correct answer: Communist name of the party and socialist economic steps

Direct answer: Option A, the Communist name of the party and socialist economic steps. Ideology means a set of ideas about how society, government and the economy should work. After October, the ruling party used a Communist identity and introduced policies associated with socialism, so ideology was not merely a slogan; it influenced state-building. The reasoning is: the party’s name expressed its political goal; economic measures such as public control and planned socialist direction expressed that goal in practice; therefore ideas and government action were connected. Option A is correct. Option B is wrong because giving palaces to nobles would preserve privilege, not show socialist state-building. Option C is wrong because keeping Tsarist laws completely would contradict the revolutionary break with the old order. Option D is wrong because tax relief for private armies is neither a normal socialist step nor evidence of the stated ideology. Exam cue: identify ideology through both official language and concrete policies.