How did numerous factors impact America after the Civil War?

The Civil War had a greater impact on American society and the polity than any other event in the country's history. It was also the most traumatic experience endured by any generation of Americans. At least 620,000 soldiers lost their lives in the war, 2 percent of the American population in 1861.

Explanation:

the answer is d. party organizers, volunteers, voters and elected officials.

a.

congress passed laws allowing for free passage between states.