I'm pretty sure the answer is B, isolationism.
The borders got smaller for a lot of countries at the end of the Great War but the reason for Austria Hungry was because they were the ones to start the war and so as a consequence the victors of the war divided up the Austro Hungarian Empire thus reducing borders.
The Answer is B
He gave a speech. Hope this helped
Answer:
Reasons for the success of the Russian Revolution , 1917. Weakness of the Provisional Government, economic and social problems and continuation of the war led to growing unrest and support for the Soviets. Led by Lenin, the Bolsheviks seized power.
Explanation:
