Consider the following argument："If you smoke one cigarette today， then you will end up smoking another onetomorrow， and more the day after that， and before you know it you will smokingtwo packs a day and shortening your life expectancy by decades. So you shouldnot even smoke one cigarette today.”This argument contains a（ ）。 A: fallacy of equivocation. B: conceptual slippery slope fallacy. C: causal slippery slope fallacy. D: fairness slippery slope fallacy. E: all of the above