<span>When examining how Rockefeller became successful, notice that he owned absolutely everything regarding the production and transportation. This means that the answer is C) Combined vertical and horizontal integration. He became a monopoly owner meaning he owned everything regarding the production of oil and didn't rely on anyone.</span><span />
North: Had a larger population, had a great industrial advantage, the north controlled the seas, the North had more troops to fight the war. the North had railroads, steamboats, roads, and canals for faster transport of supplies and troops.
South: The south was playing defense on their own territory, the South had better Generals who knew better how to fight, and the South could produce all the food it needed.
I'm going to help you get the answers but the answers are too much to type out for you.