The Death Rate Per 100,000 for Lung Cancer Is 7

The death rate per 100,000 for lung cancer is 7 among nonsmokers and 71 among smokers. The death rate per 100,000 for coronary thrombosis is 422 among nonsmokers and 599 among smokers. The prevalence of smoking in the population is 55%. The population etiologic fraction of disease due to smoking is:

A) 0.80 for lung cancer and 0.28 for coronary thrombosis.
B) 0.80 for lung cancer and 0.18 for coronary thrombosis.
C) 0.83 for lung cancer and 0.28 for coronary thrombosis.
D) 0.83 for lung cancer and 0.18 for coronary thrombosis.
E) It cannot be determined from the information provided.