B. The Union spent over double the amount of money of the Confederacy
The graph shows four different economic effects of the American Civil War: Government Expenditures, Property Destruction, Loss of Human Capital in terms of estimated costs in millions of 1860 dollars. According to the data presented in the graph, the Union spent $2,302 million on the war effort, while the Confederacy spent only $1,032 million, which means that the Union spent over double the amount of money of the Confederacy.