Using smokeless tobacco will most greatly increase the risk of

Using smokeless tobacco will most greatly increase the risk of oral cavity cancer (which includes mouth, tongue, cheek, gum cancer). Yes, even though smokeless tobacco help some people to quit smoking, it can still cause cancer such as oral cavity cancer and other health problems. The cancer-causing agents in smokeless tobacco are tobacco-specific nitrosamines (TSNAs).

the correct option is option d

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