Why is 27 February important in the study of the February Revolution?

Correct answer: On this day police headquarters was attacked and the Petrograd Soviet formed

The correct answer is A because 27 February 1917 marked a decisive escalation of the February Revolution in Petrograd. On this date, protesters and mutinous soldiers attacked or took control of important state and police centres, including the police headquarters, while representatives of workers and soldiers organised the Petrograd Soviet. These developments showed that the old authorities were losing control and that a new revolutionary power was emerging. The Treaty of Brest-Litovsk belonged to the later revolutionary period, and the Soviet Union was created only after further political developments. The Tsar did not win the war on this date. Therefore, 27 February is remembered as a major turning point in the collapse of Tsarist authority.