Which of the following choices has the parts of the bronchial tree in the correct order from largest (in diameter) to smallest (in diameter)?
a) primary bronchus, tertiary bronchus, terminal bronchioles, secondary bronchus, respiratory bronchioles, alveoli
b) primary bronchus, secondary bronchus, tertiary bronchus, terminal bronchioles, respiratory bronchioles, alveoli
c) primary bronchus, secondary bronchus, tertiary bronchus, respiratory bronchioles, terminal bronchioles, alveoli
d) primary bronchus, tertiary bronchus, secondary bronchus, respiratory bronchioles, terminal bronchioles, alveoli