Mycobacterium tuberculosis is most readily transmitted through:

a. drinking milk from or the milking of infected cows.
b. shaking hands and then rubbing your eye.
c. coughing.
d. accidental direct inoculation.

C
This disease is usually spread by inhaling the bacilli in droplets that have been coughed out by an infected person. Accidental direct inoculation can rarely occur. The type of TB that can infect cows does not cause human disease.