How did Gideon v. Wainwright expand the protections of the Sixth Amendment?

How did Gideon v. Wainwright expand the protections of the Sixth Amendment?
O It allowed defendants to waive their right to counsel without understanding.
O It guaranteed the right to an attorney only in capital cases.
O It eliminated the right to an attorney in state courts.
O It required states to provide attorneys to defendants in felony cases who cannot afford one.
Why is the concept of double jeopardy important in protecting due process rights?
O It permits multiple trials if the first trial was unfair.
O It allows the government to retry a defendant until they get a conviction.
O It prevents a person from being tried twice for the same offense after acquittal or conviction.
O It requires a grand jury indictment before trial.