Why do you think smokers are more likely to suffer from respiratory tract infections?

The smokers are suffered from the respiratory tract infections as, the effects of the tobacco damaged our respiratory part of the system. As, the smoking permanent damaged the air sacs part which are present in our lungs and it also affected the lungs elasticity while breathing. And it also tend to damage the larynx and the windpipe system and caused swelling in that part which basically caused breathing issue.

i believe your answer would be c.. : )