Which of the following is true about Miranda warnings?

The assertion that Miranda warnings must be given when the suspect is in custody and subject to interrogation is accurate. This requirement is rooted in the Supreme Court's ruling in Miranda v. Arizona (1966), which established that individuals in police custody have a constitutional right to be informed of their rights, including the right to remain silent and the right to an attorney. The purpose of these warnings is to protect a suspect's Fifth Amendment right against self-incrimination. Therefore, if a suspect is in a situation where they are both in custody and being interrogated, law enforcement is obligated to provide these warnings to ensure that any statement made by the suspect can be admissible in court.

In this context, it’s important to recognize that the other options do not reflect the legal requirements surrounding Miranda warnings accurately. They are not limited to federal cases, do not hinge solely on an admission of guilt by the suspect, and are indeed applicable to juveniles, with special considerations but not outright exemptions.