Cigarette: CR boldface

[joindk]

Smokers who switched to a low-tar, light or mild brand of cigarette will not find it easier to quit and in fact may find harder. It may be that smokers think that a lighter brand is better for their health and is therefore an acceptable alternative to giving up completely. As per a study conducted on 50,000 smokers, those who switched brands were 58% more likely to have tried to quit smoking than those who stuck with their brands. But they were 60% less likely to actually succeed in quitting. Other research has shown that so-called low-tar cigarettes have just as much tar, nicotine and other compounds as regular cigarettes.


In the above argument, the two portions in boldface play which of the following roles?

A. The first part provides evidence that, if correct, would weaken the main conclusion; the second is an explanation in support of main conclusion.
B. The first part is a prediction that, if correct, would support the main conclusion; the second is a conclusion drawn in order to support the main conclusion.
C. The first is a claim that has been advanced in support of a position that the argument opposes; the second is a claim advanced in support of the main conclusion of the argument.
D. The first is a finding whose accuracy is evaluated in the argument; the second is evidence presented in support of the main conclusion of the argument.
E. The first part is a presumption that, if correct, would weaken the main conclusion; the second provides evidence in support of the main conclusion.

from what I understood, first sentence of the argument ( 'Somkers ...harder' ) is the conclusion. And both boldface statements are PREMISE FOR.

But not sure which one to pick.
Any help?

[tim]

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