Help, I am stuck on one question. Which of these statements best describes one of the Union's advantages over the Confederacy during the Civil War? A. Union commanders had more fighting experience than Confederate commanders. B. Unlike Confederate soldiers, Union soldiers were fighting for a cause most of them believed in. C. The U.S. government had military alliances with foreign powers that increased Union troop strength. D. The North had a more widespread network of railroads available for delivering troops and supplies to the battlefield. Please explain your answer.