A nurse is collecting data from a child who has sickle-cell disease and is experiencing a vaso-occlusive crisis. Which of the following findings should the nurse expect?

A. Constipation: Vaso-occlusive crisis in sickle-cell disease is characterized by severe pain due to ischemia from blocked blood flow, rather than gastrointestinal symptoms like constipation. B. Vomiting: Vomiting is not typically associated with vaso-occlusive crisis but may occur due to pain or other causes. C. Pain: Pain is the hallmark symptom of vaso-occlusive crisis in sickle-cell disease, caused by ischemia and tissue damage. D. Bradycardia: Bradycardia is not a typical finding in vaso-occlusive crisis; instead, tachycardia might be present due to pain or stress.