Which revolution marked the transition of Russia to a Communist state following the seizure of power in 1917?

The Bolshevik Revolution is indeed the correct answer because it was the event in 1917 that led to the establishment of a Communist state in Russia. This revolution occurred in October (Julian calendar) and was characterized by the Bolshevik party, led by Vladimir Lenin, overthrowing the provisional government that had taken control after the earlier February Revolution. The Bolsheviks aimed to establish a government based on Marxist ideologies, which fundamentally changed Russia's political structure, leading to the creation of the Soviet Union.

The other events mentioned relate to key moments in the Russian Revolution, but they do not specifically represent the transition to a Communist state. The February Revolution was primarily a response to social unrest and led to the abdication of Tsar Nicholas II, setting the stage for the provisional government, which was later overthrown by the Bolsheviks during the October Revolution. The term "October Uprising" is less commonly used but generally refers to the same events that led to the Bolshevik Revolution. However, the most accurate and widely recognized term to describe the event that established the Communist regime is the Bolshevik Revolution.