Nicotine has long been known to cause heart attacks and high blood pressure. ███ █ ██████ █████ ███ █████ ████ ███ █████████ ██ █████ ███████ ███ ████ █████ ████████ ██ █████████████ ██████ █████ █████████ ███████ ███ ██ ███ ████ ███████ ████ █████ ██████████ ███████ ██ ██ █████ ██████ ██ ████████ ███████ ███████ ████████
Why do cigarette smokers who do not chew tobacco have a higher incidence of heart attacks and high blood pressure than nonsmokers who chew tobacco (and who are exposed to the same amount of nicotine)?
The right answer will be a hypothesis that does not offer a useful difference between cigarette smokers who do not chew tobacco and nonsmokers who chew tobacco. The incorrect answers will offer useful differences between these two groups, providing reasons for why the cigarette smokers showed a higher incidence of heart attacks and high blood pressure, even though both groups were exposed to the same amount of nicotine.
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