Which statement most accurately describes Nephrotic syndrome in childhood?

A. A viral lower-airway illness in infants causing cough, wheeze and increased work of breathing. B. A seizure associated with fever in a young child without central nervous system infection or another defined cause. C. Proteinuria, hypoalbuminaemia and oedema, often steroid sensitive in children. D. Acute diarrhoeal illness with risk of dehydration, especially in infants and young children.