A Early Russian<span> settles where able to quickly traverse Western </span>Russia<span>because of the long and extensive networks of rivers. This allowed for quick transportation. No network or rivers are seen in the </span>East<span> of </span>Russia<span> and so was natural slow and hard to colonize. </span>
Option C : Great Britain and Russia
A. Truman Doctrine, it was an American policy to contain soviet expansion during the Cold War