Emphysema is often cause by exposure to:\nOptions:\n- (A) high temperature\n- (B) fog\n- (C) Greenhouse gasses\n- (D) rays or beams\n- (E) hot steam\n- (F) tobacco smoke\n- (G) Pollution\n- (H) incendiary people Think carefully first, then make a decision. My thoughts:
User
Lung cancer is most often caused by exposure to tobacco smoke. Many patients with lung cancer also have emphysema. Enphysema is often caused by exposure to tobacco smoke. So the answer is (F).
Assistant