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jeffn
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How can we say depression and the rest cause fibromyalgia? We're just told that these interfere with phases during deep sleep. Saying that these conditions cause fibromyalgia is confusing correlation with causation.
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These conditions can cause a lack of Deep Sleep and lack of Deep sleep in turn can result into fibromyalgia.
The keyword here is "can cause" not "cause".

You can read GMAT Ninja's explanation of this question here:
https://gmatclub.com/forum/neuropeptide ... 46603.html


hitesharyan
How can we say depression and the rest cause fibromyalgia? We're just told that these interfere with phases during deep sleep. Saying that these conditions cause fibromyalgia is confusing correlation with causation.
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Thank you for your help
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Is this an official ques?
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rak08
Is this an official ques?

No, this is a GMAT Club Tests question.
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I like the solution - it’s helpful.
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