The correct answer is - Americans moved west in the 1800's because people wanted to get a fresh start and wanted to be able to buy their own land, as well as to try new economic possibilities, such as farming and gold mining.
In the 1800's the situation in the west started to stabilize and be much more attractive for people to move in. The problems with the native American populations were almost totally put under control so the safety issue was mostly resolved. Also the government had policies to give free land or for very small amount of money as to attract people to move there and thus have the demographic basis for implementing their rule more efficiently. For lots of people, mostly the ones from the lower class, this was seen as a golden opportunity and they used it as quick as possible.
High salary, benefit package, safe work environment, and a manageable work schedule, are all positive incentives for taking said job. A long commute is not often seen as a good thing.
A) True
The land was called no man's land because no one went on it because of the fear of getting shot and there was no protection from the trenches.
The mantle is a like a plastic looking layer of the earth
