I think it's B because all the slaves in the south were growing cotton
Sources are used in a paper to show what ideas inspired you and whose theories you would be using and you cite the sources in order to avoid plagiarism. If you don't have sources, your paper will not be valid and you could get accused of plagiarism. The more sources you use the better but you should keep in mind that they need to be important for the paper and used with a purpose and not just to increase the number of sources.
1st all black regimen, but lead by a white man
The Ancient Mayans developed the science of astronomy, calendar systems, and hieroglyphic writing. They were also known for creating elaborate ceremonial architecture, such as pyramids, temples, palaces, and observatories.
The people didn't listen. God finally judged his people and it powerfully presents Jeremiahs message so later generations might the same sins.
