Which of the following might indicate severe illness or disease? A. Taylor stays in the hospital for a week to help from a spinal injury.
B. Maria expresses suicidal thoughts.
C. Antonio's brother is choking.
D. An EMT tells Susan that she has a broken bone.

Smoking damages the respiratory system by inhalation of a foreign substance, that is absorbed and residue is left behind on our lungs sponge like substance. the gas that is inhaled also increase your blood pressure and dilates your blood vessels. also the process of inhaling and exhaling the smoke it causes irritation to the throat and mouth. smoking can cause lung cancer and other respiratory and circulatory diseases. 

You didnt put any descriptions, so i can't really tell ya which one is the best since you don't even have any..sorry.