On Admission, the Patient Was Found to Have a Blood

On admission, the patient was found to have a blood glucose level of 218. The RN knows that except in emergency situations, it is hospital policy to obtain physician's orders before administering any medication. Because the on-call physician did not return the page, the nurse administered insulin according to the common sliding scale. Four hours later, the patient was found nonresponsive in her bed and later died. According to the autopsy, the patient died from heart failure. Her postmortem blood glucose level was 22. The nurse's actions are an example of:

A) breach of contract.
B) common negligence.
C) intentional malpractice.
D) medical oversight.