Which of the Following Statements About Tuberculosis Is TRUE

Which of the following statements about tuberculosis is TRUE?

A) If an individual has tuberculosis, he or she will always demonstrate symptoms.
B) The bacterium that causes tuberculosis actually infects natural killer cells present in the lungs.
C) An effective vaccine (BCG) exists for tuberculosis; its widespread use in the 1950s resulted in the (near-) elimination of tuberculosis from most developed countries.
D) The bacterium responsible for tuberculosis has one of the fastest generation times of any bacteria.
E) None of the answer options is correct.