The causal link between phenomena refers to the existence of one phenomenon, others will cause another phenomenon, then there is a causal link between the two phenomena. One way to explore the causal link between phenomena is to seek the same method, which means that the phenomenon being studied appears on different occasions, and in each case, only one situation is common, then the only common situation is causally related to the phenomenon.
Based on the above definition, which of the following options applies the method of seeking common ground?
There have been many poisoning incidents in a village, poisoning villagers age, sex, family situation, diet, but have used water in public wells. The police concluded that well water may have contributed to the poisoning of the villagers