What legal case set the precedent that guides the nurse practitioner's duty to warn?

Choice A reason: Rennie v. Klein addresses psychiatric patient rights and treatment, not duty to warn. Choice B reason: Tarasoff v. Regents established the legal obligation for mental health providers to warn identifiable victims if a patient poses a serious threat, guiding duty to warn policies. Choice C reason: O'Connor v. Donaldson concerns involuntary commitment, not duty to warn. Choice D reason: Durham v. U.S. relates to the insanity defense, not warning obligations.