Which intervention is most appropriate when caring for a patient with delirium to prevent further cognitive decline?

Rationale: A. Overstimulation can worsen confusion, agitation, and disorientation in patients with delirium. Excessive noise, bright lights, or crowded environments may exacerbate cognitive decline rather than prevent it. B. Antipsychotics may be used cautiously for severe agitation or psychotic symptoms, but they do not prevent delirium or further cognitive decline. They carry risks such as sedation, orthostatic hypotension, and extrapyramidal side effects, and are not the primary intervention. C. This is the most effective intervention for managing delirium and preventing further cognitive decline. A calm, quiet environment with consistent routines, minimal sensory overload, frequent reorientation, and reassurance helps reduce confusion, anxiety, and agitation. These environmental strategies support cognitive function and safety, addressing one of the most important modifiable contributors to delirium. D. Allowing self-medication is unsafe in delirium, as patients may misuse medications or take inappropriate doses, increasing the risk of adverse effects, worsening confusion, and contributing to further cognitive impairment.