What were the arguments offered both the South and North for constructing a transcontinental railroad in their section? does anyone understand this question?

Just think, why was it effective? -it appeled to critics because it was written well, that made it noticeable to the public including the white population-it was also recognizable to the african americans because it was about their heritage.-it was powerful just keep finding more points and elaborate on them. message me if you need more

Identify and explain two specific cultural or political influences that islamic merchants had on sub-saharan africa.