Why Is It Especially Important to Treat Infants' Respiratory Infections

Why is it especially important to treat infants' respiratory infections promptly and to take measures to reduce the transmission of respiratory illnesses among infants?

A) Daycare facilities and other alternative care facilities will not provide care while a child is ill.
B) Infant immunizations cannot be given while a child is ill.
C) Ear infections may impair hearing and compromise the development of brain areas that are essential for language learning.
D) Respiratory illnesses are easily spread to other members of the family.