How did railroads affect western settlement in the late 1800s

explanation:

railroads had very little effect. railroads provided jobs and connected markets. railroads transported virtually all of the settlers west. railroads contributed to the discovery of minerals that brought settlers west.

answer:

1   railroads contributed to the discovery of minerals that brought settlers west.

2   railroads provided jobs and connected markets.

3   railroads transported virtually all of the settlers west.

4   railroads had very little effect.

answer; i believe that the correct answer is (chronological order);