SAT Subject US History Practice Question 150: Answer and Explanation

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Question: 150

41. The primary purpose of the Lewis and Clark expedition of 1804–1806 was to

A. make accurate maps of the Louisiana Territory
B. search for a water route across North America from the Atlantic to the Pacific
C. register all the Native American tribes living in the Louisiana Territory
D. study the various types of plant and animals in the Louisiana Territory
E. establish friendly relations with the Native American tribes of the Pacific Coast

Correct Answer: B


This was the stated purpose of the expedition in President Jefferson's written instructions to Lewis and Clark. The other purposes, such as befriending the Native Americans and cataloging flora and fauna, were secondary.

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