Which statement identifies the significance of the Supreme Court's decision in Gideon v. Wainwright? A. States can no longer have racial quotas as part of their affirmative action programs.

B. People accused of serious crimes who cannot afford an attorney must be provided with a public defender.

C. Southern states can no longer have racially segregated public schools.

D. Suspects must be advised of their right to have an attorney present or to remain silent during police interrogations.