17) B

The argument: “It would not be surprising…that today’s smokers find it harder to give up…inhaling more nicotine”

1 – Wrong
Even if the cigarettes burn at the same rate, the inhaler would take in the full amount of nicotine present in the cigarette. If there is 11% more nicotine now than before, this does not weaken the argument.

2 – Correct
If this is true, and a smoker smokes less cigarettes, then the amount of nicotine inhaled does not necessarily increase. This weakens the argument that smokers are inhaling more nicotine”.

3 – Wrong
Irrelevant to the argument

Since only statement 2 is correct, B is the answer.

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