GMAT Critical Reasoning (CR) | There is a widespread belief that people can predict

There is a widespread belief that people can predict impending earthquakes from unusual animal behavior. Skeptics claim that this belief is based on selective coincidence: people whose dogs behaved oddly just before an earthquake will be especially likely to remember that fact. At any given time, the skeptics say, some of the world’s dogs will be behaving oddly.
Clarification of which one of the following issues would be most important to an evaluation of the skeptics’ position?

(A) Which
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