Mycoplasma Tuberculosis, the Causative Agent in Tuberculosis, Primarily Infects the Alveolar

Mycoplasma tuberculosis, the causative agent in tuberculosis, primarily infects the alveolar macrophages and is therefore very fortunate in its size. Why is this statement true?

A) It is just small enough to land in the mucociliary ladder, where it is moved to the alveoli to infect macrophages.
B) It is just large enough to land in the respiratory bronchiole, where it migrates to the alveoli.
C) It is just small enough to land in the bronchi, where it is absorbed by alveolar macrophages.
D) It is just large enough to land in the mucociliary ladder, where type II macrophages phagocytize them.
E) It is too small to be caught in the mucociliary ladder and too large to be immediately exhaled, thereby landing it in the alveoli.