The "Bright Line Rule

The "bright line rule":

A) Allowed the interrogation of suspects to wear them down for self-incrimination
B) Allowed for the continued questioning of a suspect (after his/her rights had been given) until their counsel arrived
C) Forbade future questioning so that the authorities were not able to wear down the accused and persuade him to incriminate himself notwithstanding his earlier request for counsel's assistance
D) None of the above