Railroads encourage the growth of settlements in the west because they

AMade it easier to move products from the interior of the country to the cities
BPaid to remove local native Americans making settlement safe
CAllowed police forces to travel quickly
DPaid people to settle the Great Plains

Verified Answer :

In the United States, railroads encouraged the growth of settlements in the west because they "A. Made it easier to move products from the interior of the country to the cities," since this meant that people who moved to the west could still make a living producing goods that were ultimately sold in the more populus regions in the east.