Why did the events in Petrograd shake the central power?

Correct answer: Because Petrograd was the capital and centre of power institutions

Petrograd was the capital of the Russian Empire and the location of major political, administrative and industrial institutions. It also contained large numbers of factory workers, soldiers and government offices. Therefore, strikes, demonstrations and mutiny in the capital could directly disrupt the machinery of central rule and influence events across the country. Option A is correct. Petrograd was not a remote village, workers were central to the movement, and the First World War strongly affected the city through shortages and military pressure. A crisis in the capital was therefore a crisis at the heart of the regime.