I think it is A tell me if I am wrong.
Trade was made easier and it made people have more connections into different parts of the country.
Answer:
It was extramly dangerous to travel by wagon, there was the threat of bandits, native american tribes, and Buffalo, plus added diseases and weather conditions, when the train was invented and used for civilian use after the American civil war, railways were built from the east and mid-west to the west, they were deamed more safe and it was a faster way to travel
Answer:
slavery was the wrongdoing of people back in olden days, they had thought that colored people were the embodiment of evil and they enslaved them and degraded them, simply because of the color of their skin. and because of the wrongdoing of those people, the colored people had to fight for years to get their rights in america.
Explanation: signed, Birb.
Because many people think different things about how they should others which is why sometimes it could be legal and other times it could be illegal.