Why Was the Civil War an Important Event in the Development

Why was the Civil War an important event in the development of the American political system?

A) It revealed how differently the North and South interpreted the Constitution when it came to the relationship between the states and the federal government.
B) The leaders of the Confederacy relied on a view of American federalism that held that the country was created by agreement among sovereign states.
C) The leaders of the Union believed the Constitution meant the United States is a sovereign country, and the preamble declared that "the people" had created an indissoluble union.
D) It allowed for the establishment of the Confederate States of America which challenged the previously dominant federal system under the U.S. Constitution.
E) It settled the issues of secession and slavery, and allowed the North and the South to align their views on the jurisdiction of national and state governments-an alignment which has continued ever since.