单选题 The development of laryngeal cancer is most clearly linked to which of the following factors?
A. High-fat, low-fiber diet.
B. Alcohol and tobacco use.
C. Low socioeconomic status.
D. Overuse of artificial sweeteners.

【正确答案】 B

【答案解析】Predisposing factors for laryngeal cancer include chronic irritants such as alcohol, tobacco, and exposure to noxious fumes. About 75% of people who develop laryngeal cancer are smokers. The combination of smoking and heavy alcohol intake is even more strongly implicated as a causative agent in the laryngeal cancer.