Which of the following is not a trend we find in the respiratory tract?
A) The epithelium gradually increases in height as we move deeper into the respiratory tract.
B) The amount of smooth muscle and elastic fibers increases as we move deeper into the respiratory tract.
C) The number of goblet cells progressively decreases as we move deeper into the respiratory tract.
D) The amount of hyaline cartilage decreases as we move deeper into the respiratory tract.