A Nurse Failed to Monitor a Patient's Respiratory Status After

A nurse failed to monitor a patient's respiratory status after medicating the patient with a narcotic analgesic.The patient's respiratory status worsened,requiring intubation.The patient's family claimed the nurse committed malpractice.What must be present for the nurse to be held liable? (Select all that apply.)

A) A nurse-patient relationship exists.
B) The nurse failed to perform in a reasonable manner.
C) There was harm to the patient.
D) The nurse was prudent in her performance.
E) The nurse did not cause the patient harm.
F) Duty does not exist.