In the late 1700s and early 1800s, the Osage tribe traded only with Chouteau brothers’ outlets, which indicated the traders’ __________ of the local fur trade.

If the Osage traded only with the Chouteau brothers’ outlets, the brothers had exclusive control over access to that trade. This is a monopoly, so choice C, “monopoly,” fits; “frontier,” “evangelism,” and “revival” do not describe exclusive control of a market.

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