GMAT Critical Reasoning (CR) | Re: Switching to "low-yield" cigarettes, those that yield less nicotine, t

Switching to "low-yield" cigarettes, those that yield less nicotine, tar, and carbon monoxide than regular cigarettes. When tested on a standard machine, does not, in general, reduce the incidence of heart attack. This results is surprising, since nicotine and carbon monoxide have been implicated as contributing to heart disease.

Which one of the following, if true, most helps to resolve the apparent discrepancy?

(A) Smoking low-yield cigarettes has become fashionable, as relatively