Answer:
Steam-powered trains.
Explanation: Railroads provided the most dramatic transportation growth during the 1800s. They facilitated the movement of people, goods, and information, decreased shipping costs and time, and strengthened the links between the Old Northwest and the East.
Answer:
D all of these are ways to take part in politics
The answer would be C, different economics, because the northern states were going through an economic boom, due to industrialization. The southern states were running on slave labor.