Critical Reasoning

Addiction to nicotine in cigarettes prevents many people from quitting smoking. To make quitting easier, lawmakers in Tarnia passed legislation that will reduce the average quantity of nicotine per cigarette by half over the next five years. Since the lower a smoker's nicotine intake is, the easier it is for that person to quit, the proportion of Tarnians attempting to quit smoking who succeed in their efforts will probably increase significantly during these five years.

Which of the following is an assumption on which the argument depends?

A. The strength of a person's nicotine addiction depends only on the amount of nicotine that person regularly consumes.
B. Most of the cigarette smokers in Tarnia would quit smoking if they were not addicted to nicotine.
C. It is unlikely that many Tarnians who have not already become addicted to nicotine will become addicted to nicotine at some time over the next five years.
D. Tarnian smokers addicted to nicotine will not generally compensate for a decrease in the amount of nicotine per cigarette by smoking more cigarettes.
E. All cigarettes currently sold in Tarnia contain the maximum amount of nicotine permitted by law.

OA: D

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