A recently widowed older-adult patient is dehydrated and is admitted to the hospital for intravenous fluid replacement. During the evening shift, the patient becomes acutely confused. Which possible reversible causes will the nurse consider when assessing this patient? (Select all that apply.)

A. Hypoglycemia is a reversible cause of acute confusion or delirium. B. Dementia is generally progressive and not reversible, making it a less likely cause of sudden confusion. C. Electrolyte imbalance is a reversible cause of acute confusion or delirium. D. Drug effects are reversible causes of acute confusion and delirium. E. Sensory deprivation is reversible cause of acute confusion or delirium.