Through what route does expired air move as it leaves the body?
- Aalveoli $\rightarrow$ trachea $\rightarrow$ bronchiole $\rightarrow$ bronchi
- Balveoli $\rightarrow$ bronchiole $\rightarrow$ bronchi $\rightarrow$ trachea
- Ctrachea $\rightarrow$ alveoli $\rightarrow$ bronchiole $\rightarrow$ bronchi
- Dtrachea $\rightarrow$ bronchi $\rightarrow$ bronchiole $\rightarrow$ alveoli