C. It was a description of the class struggle and the problems caused by capitalism.
The answer to this is false
answer: the italian peninsula :)
Answer C: The Russian territories of the Ukraine and Poland were surrendered to Germany. During this peace treaty Russia yielded power over the Baltic States to Germany. The treaty included the recognition of the independence of Ukraine. But it didn't mention anything about the Kingdom of Poland because Russian Poland was not owned by the Bolsheviks.
Weather will be the primary reason. Despite its huge size. the real habitable area is probably less than 10% of its geographical size. Even Southern Ontario is deemed by many I know to be "too cold to live". 90% of Ontario and Quebec are simply inhabitable. I also personally think the entire Manitoba and Saskachewan are not suitable for human habitation unless we can create a way to simply hibernate during the 6 month winter (why there are so few people in Montana and North Dakota?) The fact that Montreal are thrive as a vibrant metropolis is already sort of a miracle and we don't see many such large cities with such severe weather. The only other case I can think of is probably Moscow.