Question

Which historical event most caused the US urban population to climb from 6 million to 44 million between 1860 and 1910?

Answer 1

Is this the complete question?

Answer 2

If these are the options:
A. Union defeat of the Confederacy in the US Civil War

B. discovery of gold near San Francisco, California

C. United States winning the Spanish-American War

D. development of factories during the Industrial Revolution

Answer 3

then it would be: d. the development of factories during the industrial revolution.
I know this because I am doing US History :D make sure to post this in the correct section next time :D @Ultrilliam

Answer 4

@Ultrilliam if you could move it to the history section please :)

Answer 5

but it is in the history section O.o

Answer 6

Voca moved it :/

Answer 7

oh lol