In Gideon v$.$ Wainwright $(1963),$ the Supreme Court ruled which of the following?

a$.$ The evidence admitted at Gideon's trial was obtained through an illegal search and seizure.

b$.$ Gideon had the right to be represented by an attorney, even if he could not afford one.

c$.$ Gideon should be released as his confession was coerced.

d$.$ Gideon could legally represent himself at trial.