Ships can transit between the Atlantic and Pacific Oceans using the Panama Canal.
The answer would be B, because there was more opportunity outside of what was the current U.S. Also Manifest Destiny drove the people to move the desire of what they wanted and what they dream was on the outside of what they currently knew as their own.
Answer:
Probably because in the south, the farmers needed help with gathering alot of crops, such as cotton. In the north, they didn't have farms, so they didn't need slaves.
