One important goal accomplished by the lewis and clark expedition was the a. mapping of the american west b. establishment of forts across the american west c. claiming of the pacific ocean for the united states d. collection of large stores of precious metals

the second significant cause of the great migration was the desire of black southerners to escape segregation, known euphemistically as jim crow. rural african american southerners believed that segregation - and racism and prejudice against blacks - was significantly less intense in the north.