In the Late Nineteenth Century,the Surge of Farming Settlement in the West

In the late nineteenth century,the surge of farming settlement in the West

A) spurred the development of massive irrigation projects.
B) was composed of mostly settlers who had little to no experience with farming.
C) was a result of many factors, but the most important was the railroad.
D) was primarily the result of federal subsidies for land ownership.
E) was brought to a dramatic halt by a major drought during the 1870s.