Answer:
I believe it is C
I asked my history teacher about this and she said it is right. Also I believe trade these days does not relate that much to political history.
So sorry if I am wrong
Machines made it easier to complete hard tasks(such as the cotton gin) and they also could get work done faster than humans, which lead to a much grander scale of production in goods. Hope this helps :D
Ellis island is the answer ,angel island was on the west coast
Depending on what you mean, it changed when the north saw that slavery was not just, and started goin on the attack on it. Which lead to the whole civil war of confederates vs the union
