Workers and soldiers gathering in the Duma building gave birth to which new legitimacy?

Legitimacy of a worker-soldier representative council

The governing concept is revolutionary legitimacy based on popular representation rather than dynastic authority. As workers and soldiers gathered in the Duma building, they helped form the Petrograd Soviet, a council claiming to speak for organised workers and soldiers. Its authority came from participation and representation in the revolutionary movement, not from the Tsar, foreign commercial interests or the Church. Option C is correct because it identifies the new worker-soldier representative institution and its political legitimacy. Option A refers to the old autocratic principle, while B and D have no connection with the formation of the Soviet or the social forces driving the February Revolution.

This is a Class 9 History question. Chapter: Socialism in Europe and the Russian Revolution. Topic: The February Revolution in Petrograd.