Which of the following statements is false?

• A
  The conducting part of the respiratory system transports the atmospheric air to the alveoli.
• B
  The conducting part of the respiratory system clears the air of foreign particles,humidifies it,and brings it to body temperature.
• C
  The exchange part of the respiratory system is the actual site where $O_2$ and $CO_2$ exchange takes place.
• D
  None of the above.