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Insomnia

Expert replies
by psychomath » Wed Oct 13, 2010 7:20 am
A recent study showed that, typically, people with caffeine addictions are more likely to suffer from insomnia than those who consume little or no caffeine. Based on this study, a researcher asserted that sufferers of insomnia are therefore more likely to develop caffeine addiction.

A. Some people who consume caffeine do not suffer from insomnia.
B. People who suffer from insomnia usually find that trying caffeine makes their symptoms worse and rarely continue its use.
C. Many insomniacs consume coffee and energy drinks, both of which contain high levels of caffeine.
D. People with high levels of stress are also more likely to develop insomnia than the average person
E. Caffeine addictions are easier to overcome, since the symptoms of caffeine withdrawal are relatively minor.

I had doubt between B and D. The answer is clearly B, But isnt it true that in weaken questions like "IF X causes Y", the answer choice is the one which says Z also causes Y?
Like in this question the choice D specifies another reason that causes insomnia so y is that answer wrong....

TIA[/spoiler]
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Source: — Critical Reasoning |

by uwhusky » Wed Oct 13, 2010 9:19 am
Can you transcribe the question correctly first?
Yep.
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by psychomath » Thu Oct 14, 2010 6:44 am
Apologies for incompletely leaving the Question. The question is which of the statements weaken the conclusion
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