Answer:
C. 3 million
Explanation:
Conducted by the Census Office, it determined the resident population of the United States to be 23,191,876—an increase of 35.9 percent over the 17,069,453 persons enumerated during the 1840 Census. The total population included 3,204,313 slaves.
In the Spanish Civil War, the Republicans represented the democratically elected government. There was a great conflict between Republicans and Nationalists during the civil war.
Meriwether Lewis and William Clark and Sacagawea