What was the combined importance of the events of 27 February?

Correct answer: The attack on the police headquarters, soldiers’ mutiny and formation of the Petrograd Soviet made the movement decisive

The governing concept is the transformation of a protest into a revolutionary challenge to the Tsarist state. On 27 February 1917, unrest in Petrograd expanded beyond workers’ demonstrations. The attack on the police headquarters weakened the machinery of repression, while the mutiny of soldiers deprived the government of dependable armed support. At the same time, the Petrograd Soviet was formed as an organised representative body of workers and soldiers. Together these developments made the movement more powerful, coordinated and difficult for the monarchy to suppress. Option A is correct because it states all three linked developments. Options B, C and D are unrelated or historically incorrect: the Tsar did not win the war, peasant support was not the decisive event, and the Duma did not establish foreign rule.