Which of the following is true?

A. Busing was found to improve student's racial attitudes and minority students' performance on standardized tests.
B. Public schools are more racially segregated now than they were at the beginning of forced busing programs.
C. The Supreme Court prohibited forced busing across school district lines in cases where those lines were not drawn deliberately to keep races apart. 
D. White flight to suburban schools has made it more difficult to desegregate urban schools.
E. All of these answers are correct.

Answer: E