Which of the following factors was not a reason why railroads were first built in the Indian territory? A. To make it easier for a white settlers to come to the Indian territory
B. To encourage the Indian territory to trade with its neighbors
C. To take job opportunities away from non-American Indians
D. To help companies access coal and oil resources in the territory

Option: C. To take job opportunities away from non-American Indians.

Explanation:  

Railroads first built in the Indian territory to establishing control over the West and the Native Indians. The first rail lines started working in the 1830s. Railroads connected markets where farmers could sell their goods. Railroads encouraged immigration more quickly. New towns, farms, and ranches pressed against the native homelands, that led to upsetting economies and disputes that always ended badly for Indians. Rail connections to the Great Plains proved devastating as white people began to kill bison for pleasure.

i would say b. research typically uses a variety of sources

answer; the region experienced a surplus of food;