Which of the Following Phenomena Is Most Likely Occurring During

Multiple Choice

Which of the following phenomena is most likely occurring during a child's alveolar stage of lung development?

A) Terminal alveolar sacs are developing, and surfactant production is beginning.
B) A single capillary network exists, and the lungs are capable of respiration.
C) The conducting airways are formed, but respiration is not yet possible.
D) Primitive alveoli are formed, and the bronchi and bronchioles become much larger.