Select the correct answer. If something is painful during exercise, what should you do?
A. Back off the exercise.
B. Modify the exercise.
C. Consult a physician if the pain persists.
D. All of the above

Inaccuracy is a disadvantage

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.