GMAT Critical Reasoning (CR) | Re: Asthma, a chronic breathing disorder, is significantly more common tod

We are looking for a statement that if true would negate the argument that exposure to swimming pool water is the reason swimmers have higher incidence of asthma than other athletes. Well, this argument is a classic correlation-causation error. If we can point out that the correlation does not imply causation in this case, e.g., by showing that something else causes the correlation, we will weaken that argument. Answer choice D explains why swimmers have relatively high incidence of asthma - asthmatic
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