how does the text describe A)the civil war as the costliest american war
i. Due to the high economic expenses involved
ii. Because of the significant loss of life and resources on American soil
iii. As a result of extensive military technology used
iv. Mainly due to international involvement
B) In what sense is the Civil War referred to as the "second American Revolution" in the text?
i. It brought about a complete change in the American political system
ii. It marked a shift in the nation's economic structure
iii. It resulted in the establishment of a new form of government
iv. It led to transformative changes, particularly in ending slavery and redefining the nation's political and social structure