Answer:
First one:C) It brought the Bolshevik revolutionaries to power.
34) D) industrialization and mechanization.
35)A) Balkans
Step-by-step explanation:
The October revolution launched a revolution against the provisional government and put the Bolcheviks in charge, leaving Vladimir Lenin, their leader as the supreme leader of the Soviet Republic.
The WWI reflected a general trend of industrialization and mechanization, where armies started to use more and more machines and technology to fight.
The Balkans were known as Europe powder keg, since all it requiered was a little spark to ignite a heavy fire, the countries that had the rising tension were actually that big or influential, but many big empires had heavy interests to protect in there so when they went to war, the bug countries and powers went to war with one another as well.