Which of the following are rules for interrogation?

The correct answer encompasses all the listed options, reflecting key principles for effective interrogation.

Conducting an interrogation in a private area is crucial as it ensures confidentiality, minimizes distractions, and helps create an environment where the suspect may feel more relaxed and open to communication. A private setting can also prevent outside influences from affecting the interrogation dynamics.

Having the setting be unfamiliar to the suspect can enhance the interrogator's control over the situation. When a suspect is in an unfamiliar environment, they may feel disoriented or anxious, potentially making them more susceptible to questioning techniques.

Eliminating obstacles during the interrogation process, such as physical barriers between the interrogator and the suspect, fosters a more direct and personal interaction. This setup encourages rapport-building and can make the suspect feel more engaged and less defensive, which can be advantageous in obtaining information.

These combined elements contribute significantly to the effectiveness of an interrogation, making the option that includes all these principles the most accurate choice.