What is the number one cost of the American Civil war?

A social, B economic, C political.

Political is the best answer

B.

Four years of civil war drained the American economy in both the North and the South. In the 1850s, the U. S. government was spending about $1 million every week. By mid-1861, the first year of the war, the Union alone was spending $1.5 million every day, and the amount continued to climb.