What was the result of the growth and spread of railroads in the American
West?

In the West, railroads helped open new territory to economic exploitation, and then played a large part in the creation of the first national parks. They also pioneered modern forms of hotels, resorts, and restaurants. As the nineteenth century ebbed, every aspect of society and culture was reflected in the railroad.

Explanation:

by 1890 new railroads had helped cattle ranching spread of most parts of the west. long cattle drives were replaced by shorter drivers on local trails built in the growing east while railroads were built in the west for the first time cow towns exist where trails meet railroads

the answer is )multiethnic

d) in the state of iowa