1) it helped to be able to make more merchandise
2) it made people get more money in buisnesses
A common practice was to pay ridicilously small wages to workers themselves and pay even less to children and women who were working at factories. Another thing that was done was to either import foreign workers who would have to work for even less, or to move production to companies overseas where they would set up a distribution and where workers themselves would also have to work for very small amounts of money. This increased their profit margins.
D) PGT Beauregard is your answer
Jubal Early and Stonewall Jackson were Confederate Generals, while Irvin McDowell was a Union general.
hope this helps