Which of the Following Describes the Journey of a Molecule $\rarr$

Multiple Choice

Which of the following describes the journey of a molecule of oxygen from the atmosphere to an alveolus?

A) nasal cavity $\rarr$ pharynx $\rarr$ larynx $\rarr$ trachea $\rarr$ bronchus $\rarr$ bronchiole $\rarr$ alveolus
B) nasal cavity $\rarr$ larynx $\rarr$ pharynx $\rarr$ trachea $\rarr$ bronchus $\rarr$ bronchiole $\rarr$ alveolus
C) nasal cavity $\rarr$ pharynx $\rarr$ larynx $\rarr$ trachea $\rarr$ bronchiole $\rarr$ bronchus $\rarr$ alveolus
D) nasal cavity $\rarr$ trachea $\rarr$ pharynx $\rarr$ larynx $\rarr$ bronchiole $\rarr$ bronchus $\rarr$ alveolus