Researchers have found that most peopleʼs bodies

Answer choices

1. A

   Correct70% picked this

   the most common form of CYP2A6 is the one that most rapidly eliminates nicotine

   Why this is right

   This connects the special thing we know about frequent-smokers (they have the most common form of CYP2A6) to the trigger we have that leads to more smoking (faster elimination of nicotine from the body). (by the way, this question does an astoundingly good job at making us think we read "Smokers whose bodies make the most of this enzyme". I read it that way the first time I did this problem, and I just read it that way again. I'm not sure how they're doing it, but I just read over "most common form" and think it's about quantity of CYP2A6, rather than the specific form of CYP2A6. I had already written the explanation incorrectly when I got to the answers and finally noticed my mistake)

   Skill tested: Most Supported · how this choice captures the argument's function is the move to repeat next time.

   70%
2. B

   Unrelated to Goal1% picked this

   most people whose bodies make the rarest form of CYP2A6 do not

   We don't want an answer talking about people who don't smoke. We're trying to explain why "most common form of CYP2A6" and "smoke the most" are correlated.

   1%
3. C

   Too Weak2% picked this

   if one?s body does not make CYP2A6, nicotine will still be eliminated,

   This weakly makes the case that having CYP2A6 leads to more rapid elimination of nicotine, since lacking CYP2A6 leads to very slow elimination. However, this doesn't differentiate between "the most common form of CYP2A6" and any other form, and we need to do that in order to explain why smokers with the most common form tend to be the heaviest smokers.

   2%
4. D

   Out of Scope: greater quantity27% picked this

   the greater the quantity of CYP2A6 that one?s body makes, the faster nicotine

   If you misread the paragraph and thought that it said "smokers whose bodes make the most CYP2A6 tend to smoke more", then this would be your perfect answer. Unfortunately for those of us who read it that incorrect way, the passage never talks about varying quantities of CYP2A6. It just talks about different forms of CYP2A6 -- there's the most common form and then there are other forms.

   27%
5. E

   Out of Scope: other functions0% picked this

   helping to eliminate nicotine is not the only function that

   Our job is to relate the "most common form of CYP2A6" to "smokes most often". This answer doesn't differentiate between the "most common form" and any other form of CYP2A6, so it will be functionally useless to us. And since it's talking about things other than eliminating nicotine, this answer won't even relate to smoking cravings.

   0%