Delirium occurs in response to all the following stressors except

A. Electrolyte imbalance is a common stressor that can trigger delirium. Changes in electrolyte levels, such as sodium or calcium, can lead to confusion, agitation, and altered mental status. B. Head trauma can also lead to delirium, especially if the injury affects the brain's function or causes swelling or bleeding that impacts cognition and awareness. C. Depression is typically not a direct cause of delirium. While depression can lead to cognitive symptoms like memory problems and slowed thinking, it is not usually associated with the acute confusion and fluctuating consciousness seen in delirium. Delirium is typically caused by physical stressors, such as illness or injury, rather than psychological conditions like depression. D. Infection is a common trigger for delirium, particularly in older adults or those with weakened immune systems. Infections like urinary tract infections or pneumonia can lead to acute confusion, agitation, and changes in mental status.