When discussing care of an infant with congenital hypothyroidism, you would stress that the infant will need:

A. Vitamin K is routinely given at birth to prevent hemorrhagic disease but is not required long-term for congenital hypothyroidism. B. Vitamin C supplementation is not specifically indicated for congenital hypothyroidism. C. Levothyroxine is the standard treatment for congenital hypothyroidism. Early and consistent administration is crucial for normal growth and neurodevelopment. Most infants will require lifelong therapy, with periodic monitoring and dosage adjustments based on growth and thyroid function tests. D. While calcium is important for overall growth, congenital hypothyroidism does not specifically require increased calcium intake beyond standard nutritional recommendations.