To Determine Whether a New Patient's Confusion Is Caused by Dementia

To determine whether a new patient's confusion is caused by dementia or delirium, which action should the nurse take?

A) Assess the patient using the Mini-Mental Status Exam.
B) Obtain a list of the medications that the patient usually takes.
C) Determine whether there is positive family history of dementia.
D) Use the Confusion Assessment Method tool to assess the patient.