A nurse is discharging a child who has sickle cell anemia after an acute crisis episode. Which of the following instructions should the nurse include in the teaching?

A. Offering fluids frequently helps prevent dehydration, which can trigger sickle cell crises by increasing blood viscosity and promoting sickling of red blood cells. B. Limiting outdoor activity is unnecessary; children with sickle cell anemia should remain active, though they should avoid extreme temperatures and overexertion. C. Cold compresses can cause vasoconstriction, which may worsen pain during a sickle cell crisis; warm compresses are preferred to promote circulation and comfort. D. Monitoring temperature daily is important because children with sickle cell anemia are at increased risk for infections, which can precipitate a crisis; prompt recognition allows early treatment.