The Nurse Manager Is Aware That Which Incident Would Be

The nurse manager is aware that which incident would be classified as a sentinel event?

A) The patient receives an oral antidiabetic medication 6 hours after it should have been administered.His blood sugar is slightly elevated,but it returns to its normal range within 1 hour.
B) The patient receives a second-degree burn from a malfunction in a hypothermia blanket.
C) The patient got dizzy and sat down on the floor approximately 1 hour after the administration of an antihypertensive medication.The patient did not experience any injury.
D) The patient is using a continuous passive exercise machine after knee surgery when the machine quits working.The patient complains of pain when the knee is removed from the machine.The pain is relieved after the administration of pain medication.