Among the 250 known harmful chemicals in tobacco smoke, at least ________ can cause cancer.
A. 69
B. 59
C. 49
D. 79
Among the 250 known harmful chemicals in tobacco smoke, at least 69 can cause cancer.
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Asked 9/7/2012 2:12:55 PM
Updated 7/4/2016 1:25:32 PM
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