Why did the Supreme Court overturn Brown v. Board of Education? (Site 1)

I memorized this from www.ourdocuments.gov, and I hope it will be able to answer your question:

"On May 17, 1954, U.S. Supreme Court Justice Earl Warren delivered the unanimous ruling in the landmark civil rights case Brown v. Board of Education of Topeka, Kansas. State-sanctioned segregation of public schools was a violation of the 14th amendment and was therefore unconstitutional."

Have a nice day!

can you attach the answer options

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;