Kevin, a Suspect for Murder, Is Being Interrogated at His

Kevin, a suspect for murder, is being interrogated at his local police station.The police have Kevin in a small, soundproof room, sitting in an armless chair.The police officer is leaning in and accusing Kevin of doing horrific things to the victim.The police officer says that he doesn't understand why Kevin would do such a horrible thing, but that they have "mounds" of evidence against him (this last part is a lie) .Which of these details is not recommended by Inbau et al.in their book Criminal Interrogation and Confessions?

A) Kevin shouldn't be sitting in a small, soundproof room in an armless chair.
B) The police shouldn't make an exaggerated statement about the amount of evidence they have against the suspect.
C) The police shouldn't say that they don't understand why Kevin would do the crime in question.
D) none of the above (all are recommended by Inbau et al.)