How did the number of factories in the north affect the civil war?

it gave the south an economic advantage.
it gave the south a military advantage.
it gave the north a military advantage.
it gave the north a political advantage.

C, factories don't help with politics but can make guns, ironclads, gatling guns, and more.

it was on the rise and doing very well and would continue to do well until the great depression from 1929-1939

the answer is that the political parties encourage people to caste vote.