Your teacher assigns you a research paper on political changes in the United States during the Civil War. Which source would best aid your research? -a textbook chapter discussing Abraham Lincoln’s presidency -an atlas showing famous battles and events during the war -a book containing the letters of a US senator during the war -a phone interview with a famous Civil War political historian
The best source to aid your search would be "-a phone interview with a famous Civil War political historian", since you would be able to ask this person specific questions, although this would be unlikely to happen.