The Fetterman Massacre was an example of Plains Indians’ resistance to the building of the transcontinental railroad. Which of the following statements best explains why tribes often reacted to the railroad with hostility?

The railroad crossed Plains tribes’ lands and made it easier for settlers, workers, and the military to enter those territories. This threatened tribal sovereignty, resources, and ways of life, leading many tribes to resist. So the best choice is that they were angered by the railroad’s advances into their lands.

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