A nurse is assessing an adolescent who has an exacerbation of Graves' disease. Which of the following findings should the nurse expect?

A. Lethargy: Lethargy is a symptom of hypothyroidism, where metabolism is slowed. In Graves' disease (hyperthyroidism), the metabolic rate is increased, leading to symptoms such as restlessness, nervousness, and difficulty sleeping, rather than lethargy. B. Bradycardia: Graves' disease is associated with tachycardia (increased heart rate) due to hyperthyroidism, not bradycardia (slowed heart rate). C. Weight gain: Weight loss is more typical in Graves' disease due to an increased metabolic rate. Weight gain would be unusual and inconsistent with the condition. D. Heat intolerance: Heat intolerance is a common symptom of Graves' disease because hyperthyroidism causes an elevated metabolic rate, making the body more sensitive to heat. This is a key finding in the exacerbation of Graves' disease.