The pediatric nurse explains to the parents of a 1-year-old patient with pneumonia that the ...

The pediatric nurse explains to the parents of a 1-year-old patient with pneumonia that the differences between the adult's and child's respiratory system affect function and subsequent respiratory conditions.
 
  Which difference does the nurse include in the discussion with the patient's parents?
  A.
  Infants are obligate nose breathers until 6 months of age.
  B.
  The epiglottis in the child under 8 is shorter and more rigid.
  C.
  The larynx and the glottis are higher in the younger child's neck.
  D.
  In the child, there are more functional muscles in the neck and less soft tissue.