A hospitalized elderly client suddenly develops acute confusion, disorientation, and fluctuating levels of consciousness. The nurse suspects delirium. Which assessment finding further supports this suspicion?

The correct answer to the question "A hospitalized elderly client suddenly develops acute confusion, disorientation, and fluctuating levels of consciousness. The nurse suspects delirium. Which assessment finding further supports this suspicion?" is Option C: Disturbance in attention and awareness..

The other options — A) Gradual onset over several months., B) Irreversible cognitive decline., D) Intact psychomotor activity. — are incorrect for this NCLEX-RN Exam Prep question. As explained above: Acute onset of confusion, disorientation, and a fluctuating course with an inability to focus or sustain attention are key diagnostic criteria for delirium, distinguishing it from dementia.