I don’t know I think it’s 2, 3, 4, 6
Option A contains you fragment, the second scentence does not contain a noun.
It is a statement of opinion best describes the statement
The correct answer is <span>frontiersmen
He believed that people should go to the United States and get their own piece of land and work on it and live well. He believed that frontiersmen were selfish and greedy and just wanted to take more and more and were thus exploring the frontier and that it would ruin the society because again people would get too much land and power.</span>