Which of the following statements describes the effects of the Sand Creek Massacre?

After the Sand Creek Massacre, Cheyenne and Arapaho survivors and allied groups retaliated against white settlements and transportation routes in Colorado. Their attacks included raids on ranches and mail or postal stations. They did not simply move to reservations, hold protests in Washington, or send letters as the main effect described here, so the best answer is A: they retaliated by raiding ranches and postal offices in Colorado.

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