All of the above would be important factors .
Filmmakers most likely chose this name because it was about the Selma to Montgomery marches that Dr. King participated in. The name is Selma and not Dr. King because it is a story told over a three month period where Dr. King and many others planned the Selma marches.
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Answer:
State's rights was refereed to the struggles between the federal government and individual states over political power.
Explanation:
The Northerners were the ones that became opposed to slavery. It didn't matter whether it was for moral or economic reasons.
The Southerners were became more united in their defense of slavery.
Sectionalism is known as the loyalty or support of a particular region or section of nation.