In the early 1840s, a large increase in the migration of American settlers west of the Mississippi River was sparked by   A. the economic depression that began in 1837.   B. Mexico's sale of California to the U.S. in 1840.   C. abolition of slavery in the Deep South.   D. a widespread rejection of the concept of manifest destiny.   E. Indian tribes regaining land east of the Mississippi River

A.

the economic depression that began in 1837.

B.

Mexico's sale of California to the U.S. in 1840.

C.

abolition of slavery in the Deep South.

D.

a widespread rejection of the concept of manifest destiny.

E.

Indian tribes regaining land east of the Mississippi River