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aschaffer aschaffer
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6 years ago
A 50-year-old is diagnosed with lung cancer. The health history includes a 30-year history of smoking, exposure to air pollution, asbestos, and radiation. What had the greatest impact on the development of his cancer?
 
  a. Radiation
  b. Cigarette smoke
  c. Asbestos
  d. Air pollution
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#1
6 years ago
ANS: B
The most common cause of lung cancer is tobacco smoking. While considered risk factors, nei-ther exposure to radiation, asbestos, nor air pollution is the most common of the known triggers.
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