The Nurse Is Educating the Family of a Patient in the Intensive

The nurse is educating the family of a patient in the intensive care unit about the patient's cognitive status, including the current problem of delirium. Which statement by the family indicates a need for further education?

A) "The delirium can be caused by sensory overload."
B) "The delirium is reversible."
C) "The delirium is a mood disorder."
D) "The delirium is a state of confusion."