I dont have a good feeling about this , but IMO A. I might be completely wrong also.

OA is C.

arora007 wrote:OA is C.

The fight was between A and C , but i chose A coz i found that sleep is playing a minor role.

Lets analyse in detail : -

Theory :- "This theory is concerned with the function of neuropeptide substance P, which is released in the spinal cord in response to pain and causes nerve endings around the initiating nerves to also become more sensitive to pain. Normally, this mechanism is "reset" during deep sleep. If pain becomes body-wide, however, and the mechanism can not be reset, this process may run out of control. "

IMP points :--- Substance P and the mechanism reset in sleep.

What if its not reset in sleep ? It doesnt reset only when pain is widespread.

Negating the option :- Deep sleep is not so necessary to the healthy functioning of the nervous system.


Hope it helps .

The wrong answer choices here all can be eliminated for reasons of scope. The key to this question is in recognizing it as a Casuality question, the most predictable types CR question on the GMAT. The basic argument is that:

lack of deep sleep --(causes)--> not "resetting" the substace P mechanism --(causes)--> fibromyalgia/pain

The underlying Assumption, then is simply:

(nothing else) --(causes)--> the same effects.

A classic Weakener would then be "[some other factor other than lack of sleep] is in fact the primary cause/"

Choice (C) says: Deep sleep is necessary, meaning that without it, there will be problems. If we negate this, and find that deep sleep isn't necessary, then it's entirely possible that other factors could be the culprits, not the lack of deep sleep.

The wrong answers:

(A) "The body" is way too broad in scope for this argument; other parts of the body besides those associated with "deep sleep" could contradict this argument. Furthermore, the negation of this choice reads: "the body has an unlimited amount of control over substance P," meaning, the body has infinite control over this substance. If this is the case, then interfering with deep sleep could very well cause a complete and total change in the substance P mechanism, still supporting the argument.

(B) Treating or preventing fibromyalgia or anything else is outside the scope of its causation.

(D) Curing fibromyalgia is completely outside the scope of its causation.

(E) Who should treat fibromyalgia is completely outisde the scope of its causation.

Lesson to learn: If you identify this as a Causality question, it borders on being easy. If not, it's very very challenging. All the more reason to learn those classic patterns of questions and answers for CR and all areas of the GMAT!

Thanks Adam for the wonderful insight into the question , i totally missed the scope in option A . So "Scope" wil be the takeaway learning from this CR .

Adam@Knewton wrote:The wrong answer choices here all can be eliminated for reasons of scope. The key to this question is in recognizing it as a Casuality question, the most predictable types CR question on the GMAT. The basic argument is that:

lack of deep sleep --(causes)--> not "resetting" the substace P mechanism --(causes)--> fibromyalgia/pain

The underlying Assumption, then is simply:

(nothing else) --(causes)--> the same effects.

A classic Weakener would then be "[some other factor other than lack of sleep] is in fact the primary cause/"

Choice (C) says: Deep sleep is necessary, meaning that without it, there will be problems. If we negate this, and find that deep sleep isn't necessary, then it's entirely possible that other factors could be the culprits, not the lack of deep sleep.

The wrong answers:

(A) "The body" is way too broad in scope for this argument; other parts of the body besides those associated with "deep sleep" could contradict this argument. Furthermore, the negation of this choice reads: "the body has an unlimited amount of control over substance P," meaning, the body has infinite control over this substance. If this is the case, then interfering with deep sleep could very well cause a complete and total change in the substance P mechanism, still supporting the argument.

(B) Treating or preventing fibromyalgia or anything else is outside the scope of its causation.

(D) Curing fibromyalgia is completely outside the scope of its causation.

(E) Who should treat fibromyalgia is completely outisde the scope of its causation.

Lesson to learn: If you identify this as a Causality question, it borders on being easy. If not, it's very very challenging. All the more reason to learn those classic patterns of questions and answers for CR and all areas of the GMAT!

how did you find that : not "resetting" the substace P mechanism --(causes)--> fibromyalgia/pain
where in the passage you found this analysis ?

thanks