Which tendency of Bolshevik rule was revealed by an organisation such as the Cheka?

Correct answer: Control and suppression of opposition

The governing concept is the use of coercive institutions to secure revolutionary power. The Cheka was the early Soviet secret police, created to investigate and suppress counter-revolution, sabotage, and political opposition. Its existence shows that the Bolshevik government used surveillance, arrests, and force while facing war and internal resistance. Option A is correct because controlling opposition was a clear feature of this practice. The Cheka did not restore the monarchy, transfer Russia to foreign rule, or primarily reform church taxation. Those alternatives are either unrelated to its function or contradict the political direction of the revolutionary government. The organisation therefore illustrates the authoritarian and coercive side of early Bolshevik rule.