Answer:
The 15 "Sunbelt" states are: Alabama, Arizona, Arkansas, California, Florida, Georgia, Louisiana, Mississippi, Nevada, New Mexico, North Carolina, Oklahoma, South Carolina, Tennessee, and Texas.
Explanation:
People would be interested in moving to them because the climate is warm and sunny. And around the 1960s there were many growing economic opportunities.
The correct answer is religious persecution and here's why:
The Mongol rule occurred at the same time but was not as important as religious persecution. Muslim rule was common earlier during the 6th century, while intellectual oppression was not a recurring issue.
The factor that increased is "Legislation that removed unfair electoral requirements"
In 1960 only 5% of African Americans were registered to vote