Correct Option: A

There are two forms of tuberculosis that cause significant disease in mammals. Human tuberculosis, a sometimes acute, but much more commonly, a chronic lung infection is caused by the bacterium, Mycobacterium tuberculosis. Bovine tuberculosis is a very similar disease that infects cattle, as well as deer, goats, elk and many other animals. This infection is caused by a related bacterium, Mycobacterium bovis. Human infections with the bovine form of the bacteria are transmitted through milk.