What statement is the most accurate regarding the structure and function of the newborn's respiratory system?
a) The respiratory tract in the child is fully developed by age 2.
b) The diameter of the child's trachea is the same as that of adults.
c) Infants and young children have smaller tongues in proportion to their mouths.
d) Most infants are nasal breathers rather than mouth breathers.
Answer: Most infants are nasal breathers rather than mouth breathers.
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