Which of the following BEST summarizes how smoking causes lung cancer to develop?
A) The carbon monoxide from tobacco smoke changes the character of blood cells, causing mutations at the site of oxygen exchange.
B) The smoke first overcomes the natural cleaning action of the lungs exposing the tissues to cancer-causing substances.
C) Tobacco smoke suppresses the immune system, causing harmful substances to invade lung tissues.
D) The smoke changes mucus on the lungs' surface to a poisonous compound.

Question

Quizplus · Accepted Answer

Smoking introduces carcinogens that damage the lung's natural cleaning mechanisms, allowing harmful substances to persist and cause mutations leading to cancer.

Which of the Following BEST Summarizes How Smoking Causes Lung