A nurse in an emergency department is caring for a preschool-age child who has acute acetylsalicylic acid poisoning. Which of the following should the nurse expect?

The correct answer is D: Hyperpyrexia. Acetylsalicylic acid poisoning can lead to metabolic acidosis, which can cause hyperpyrexia (extremely high fever). This is due to the toxic effects on the central nervous system. Neck vein distention (A) is not typically associated with acetylsalicylic acid poisoning. Jaundice (B) is more commonly seen in liver toxicity. Polyuria (C) is not a typical symptom of acetylsalicylic acid poisoning. In summary, hyperpyrexia is the most likely manifestation of acute acetylsalicylic acid poisoning in a preschool-age child, making it the correct answer.