Hey can u help me with the 4 questions plzzz

Which nation most to bail out greece’s failing economy?

What was the main cause of the russian revolution? a. the protests against the war with poland b. the tremendous war losses of world war 1 c. the protests against the treaty of brest- litovsk d. the losses dictated by the treaty of versailles

Which is an effective question for launching history inquiry related to the cold war