The correct answer to this open question is D) Americans became increasingly connected economically, politically, and socially.
The other options of the question were A) Americans increasingly opposed the authority of the federal government. B) sectional differences ked to further discussions of secession. C) Americans experienced greater division across regional lines and politics and social life.
The lives of Americans were affected after the war ended in that Americans became increasingly connected economically, politically, and socially.
Despite the loss of soldiers' lives during the war, after the armed conflict ended, people took the situation with dignity and respect, creating a positive feeling of hard work and get over the past to work diligently in the future. For some time, people generated a more solid society and the respect for the armed troops increased.