Around that time the Gold Rush was going on, and they wanted to mine gold on Cherokee land. Hope this helps!
"<span>C. conquered much of Central Asia during the eleventh century</span>" is generally true about China's Song Dynasty, but it should be noted that this took place over time.
Gatekeeping is increasing more and more. The idea of gatekeeping is that the gatekeeper is the person who disseminates the news towards people, such as news agencies or paper companies or similar things. Since you have companies owning more and more news agencies at the same time, they basically can control what all the different news services will say, which means that anything that would not be considered to be valid news would be prevented from reaching people.
Because after Word War 1 Britan had no desire to conflict!