While doing research for a thesis paper about how human migration and population distribution can greatly alter or destroy the natural landscape, you come across an article discussing american settlers traveling to the great plains to farm. which sentence from the article best supports your thesis?

a) many of the farmers on the great plains soon gave up because they could not farm the land.

b) traveling to the great plains often took months because most settlers used ox-pulled carts.

c) over time, the settlers who stayed were able to adapt and modify the landscape for farming.

d) american indians posed a challenge for americans who settled on american indian lands.

e) most american settlers had crude, ineffective tools and would have benefited from a tractor.