According to the Supreme Court in Miranda V

According to the Supreme Court in Miranda v. Arizona, involving a man who confessed to a rape following police interrogation, which of the following is true?
I. Modern interrogation procedures are psychologically oriented.
II. There were gaps in knowing what actually occurred in interrogation rooms.
III. Displayed confidence in the suspect's guilt is an important tool for the interrogator.
IV. Custodial interrogation takes a toll on the weaknesses of individuals.

A) I, II, III, IV
B) I, III, IV
C) II, IV
D) III, IV