How did the bright-line rules established in Miranda go further than earlier doctrines established by SCOTUS to ensure confessions were voluntary?

A) The earlier doctrines relied on the Fifth Amendment's clause against self-incrimination, while Miranda relied on self-incrimination, due process, and the right to counsel.

B) The earlier doctrines relied on due process, while Miranda relied on self-incrimination, due process, and the right to counsel.

C) The earlier doctrines relied on the Sixth Amendment's right to counsel protections, while Miranda relied solely on the due process clause of the Fourteenth Amendment.

D) The earlier doctrines relied solely on the due process clause of the Fourteenth Amendment, while Miranda relied on the Sixth Amendment's right to counsel protections.