Question: Molly, age 72 years, comes to the clinic with the following signs and symptoms: decreased ability to maintain attention; disorganized thinking; inability to follow directions; disorientation to time, place, and person; recent history of an altered sleep - wake cycle; and decreased psychomotor activity. Her daughter states that the symptoms have a recent onset. You diagnose Question options: 1) delirium 2) dementia 3) depression 4) Alzheimer's disease