Question

Which of these is the MOST likely explanation for the information depicted in the map?

A) Ohio was not admitted to the Union until 1870
B) People were migrating from southern to northern states.
C) Western expansion spread the U.S. population over a wider area.
D) The World Wars resulted in dramatic population shifts in the U.S.

Answer 1

I think it is C.Western Expansion 

Answer 2

C) The western expansion spread the U.S population over a wider area.