Correct answer is A) Encourage frequent small meals. This intervention helps prevent fatigue, ensures adequate nutrition, and supports growth in a child with congenital heart disease, who may become easily exhausted during regular meals.

Correct answer is B) Start broad-spectrum IV antibiotics immediately. This is a medical emergency called febrile neutropenia. Prompt initiation of broad-spectrum IV antibiotics is critical to prevent sepsis in immunocompromised children.