A Patient Has Been Admitted with a Diagnosis of Confusion

A patient has been admitted with a diagnosis of confusion.The physician's admission note states that he wants to assess for delirium versus dementia.What should the nurse be aware that the main differences include?

A) Whereas delirium usually lasts several years, dementia lasts only a few days.
B) Whereas delirium usually has sudden onset and is reversible, dementia is chronic and irreversible.
C) Whereas dementia is usually caused by medications, delirium is not.
D) Whereas dementia is easily treated with reality orientation, delirium is not.