Read the excerpt from Abraham Lincoln’s first inaugural address. In your hands, my dissatisfied fellow-countrymen, and not in mine, is the momentous issue of civil war. . . . You have no oath registered in heaven to destroy the Government, while I shall have the most solemn one to "preserve, protect, and defend it.”

–First inaugural address,
Abraham Lincoln, 1861

According to the quote, why did President Lincoln believe he had an advantage over the Confederacy?

He had the power of a trained army, while the Confederacy was in the process of training a militia.
He had a strong economic advantage, while the South had little money to spend on war.
He swore an oath to defend the government, but the Confederacy did not have an oath to destroy it.
He could control supply routes in the South, but the Confederacy could not control Northern supply lines.