Which is the most balanced evaluation of Bolshevik political centralisation?

Correct answer: It stabilised power but reduced space for political opposition

Bolshevik political centralisation helped the new government coordinate administration, defend itself in the Civil War and impose decisions across territories that had previously been governed unevenly. In that limited sense, it contributed to the consolidation and stabilisation of Bolshevik power. At the same time, concentrating authority in the party and state narrowed political pluralism, weakened competing parties and restricted open opposition. Option A is balanced because it recognises both an achievement and a serious limitation. Options B and C are false because neither the Tsar nor the Provisional Government regained lasting authority, and option D exaggerates the result.