9. _____Which of the following statements about the Lewis and Clark expedition is correct?a. It began without Congress's approval because only New England Federalists supported it.b. It made Jefferson far less popular in the southern and western United States.c. It provided vital information about the plants, animals, and geography of the Louisiana Territory.d. It delayed the United States' acquisition of the Oregon Country as it was preserved as NativeAmerican territory.e. It was unsuccessful due to violent encounters with Native American tribes like that ofSacagawea.

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