Answer: If it's in your opinion, then no. But if it's somebody else's opinion that you don't agree with, then you do have to cite your sources.
I hope that makes sense!
Explanation:
A. It was a time of cultural changes
<span>In the years before the Civil War, the economic interests of Americans in the North and Northwest grew increasingly further from those of Americans in the South and Southwest. Although the Civil War itself was caused by a number of different factors, the divergent paths taken in the economic development of North and South contributed to the animosity between the regions, the development of the Confederacy and, ultimately, the victory of the Union.</span>
