1. Explore the Missouri River to its source, cross the
Rocky Mountains, and seek a westward-flowing river
to the Pacific Ocean—the fabled Northwest Passage.
2. Report on new animals, plants, minerals, etc. in
the newly-acquired regions.
3. Establish trade with the Native American tribes
they encountered.
4. Assure the Native Americans of the peaceful
intentions of the United States government.
<em>Hello There!!</em>
<em>C. </em><em>It led people to identify themselves as their nationality</em>
<em>P.S </em><em>Tell me if this is wrong....</em>

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Answer:
D) states with large population.
Explanation:
Mark and Luke both give a list. Hope that helps.