People Infected with M

People infected with M.tuberculosis are always highly infectious to everyone around them-true or false,and why?

A) True-they are constantly shedding bacteria to the environment around them in high numbers,facilitating transmission.
B) False-while in the early stages of the illness,their tissues are not irritated and damaged to induce the cough required to spread the organism in respiratory droplets very easily.
C) True-as the mode of transmission is direct contact,anyone or anything they touch can be infected.
D) False-since TB requires a very high infectious dose,in the early stages of the disease,the patients aren't producing enough bacteria in their respiratory secretions to be infectious.