Answer: All of these answers are correct.
Explanation:
Swann v. Charlotte-Mecklenburg Board of Education, was a case that dealt with busing of students so that integration can be promoted in the public schools. According to the Supreme Court, busing was vital so that racial imbalance that was in schools can be curbed.
The Supreme Court's ruling in the Swann case on busing was different from the Brown decision in that Swann sanctioned the use of busing in desegregation, dealt with the issue of busing.
Also, the challenges concerning de facto discrimination were addressed and this was also qpplied to many northern communities in addition to communities in the South.
Therefore, all of these answers are correct.