A high school student returns to school following a three-week absence due to mononucleosis. When meeting with the student the school nurse explains it will be important for the adolescent to:

Rationale: A. Hypoglycemia is not typically a concern with mononucleosis and does not require scheduled snacks. B. Mononucleosis is caused by the Epstein-Barr virus, and antibiotics are not indicated unless there is a secondary bacterial infection. C. Avoiding contact sports is essential because mononucleosis can cause splenomegaly (enlarged spleen), which increases the risk of splenic rupture—a serious and potentially life-threatening complication. D. Aspirin is not recommended for adolescents due to the risk of Reye's syndrome.