B. Four

Dr. Glantz writes: "Evidence that e-cigarette aerosol has the same effects on an important measure of lung function as cigarette smoke undermines the assumption that e-cigarettes are uniformly less risky than conventional cigarettes."

A D.C. District Court judge has the FDA's Tobacco Products Scientific Advisory Committee (TPSAC) report on menthol because of severe financial conflicts of interest of several of its panel members.

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