We can reject answers C) and D) :those are two famous cities in Russia, and cities would be too small to take up three-forths of Russia, the biggest country in the world.
Murmansk is also a city: in the North-West of Russia, in the Arctic Circle.
So the correct answer is: Siberia
I think the correct answer from the choices listed above is option B. It is divergent plate boundary in a continental plate describes a mid-oceanic ridges. It <span>is an underwater mountain range, formed by plate tectonics. Hope this answers the question. Have a nice day.</span>
