3. The leading preventable cause of death in the United States is:

A. tobacco use

B. drunk driving

C. overdose of prescription drugs.

D. illegal drug abuse.

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4. Snuff and chew are harmful because they:

A. contain nicotine.

B. increase problems with gum and tooth disease.

C. significantly increase the risk of cancers of the mouth, lip, throat, and esophagus.

D. All of these choices are correct.