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Re: GMATPrep2: teenagers and smoking [#permalink]
1
Kudos
This is a cause --> effect problem. The author conclusion is that smoking causes depression.

You can diagram this smoking ----> depression

Now what would weaken the argument ? if the relationship is reversed depression ---> smoking the argument would be weakened.

Option A removes this possibility and therefore strengthens the argument.
This is a common well pattern in critical reasoning that repeats in a lot of problems.

You have here another problem, although is an assumption problem, with the same reasoning

researchers-and-low-level-immune-83107.html
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Re: GMATPrep2: teenagers and smoking [#permalink]
Good Question and thanku for the explanantions
Chose A right away
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Re: GMATPrep2: teenagers and smoking [#permalink]
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where is the question, cannot find... :-)
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Re: GMATPrep2: teenagers and smoking [#permalink]
One question here on (a)

why the Participants who were depressed at the start of the study were compared with those who were not depressed?

Am still confused :(
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Re: GMATPrep2: teenagers and smoking [#permalink]
I didn't see any premise and stem in this question.



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Re: GMATPrep2: teenagers and smoking [#permalink]
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