A popular view is that people can predict earthquakes through abnormal behavior of animals. In fact, this view is based on subjective analogies and may not reveal objective connections. A dog behaved abnormally before the earthquake, which will naturally give its owner Impressed. But in fact, at any moment in this world, dogs behave abnormally. To evaluate the above argument, answer which of the following questions is the least important. ["Has the animal's abnormal behavior considered to be a precursor to the earthquake ever occurred?", 'Are the two different types of animals similar in behavior before the earthquake?', 'What was the proportion of animals with abnormal behavior before the earthquake.', 'What percentage of animals that had abnormal behavior before the earthquake was not noticed.']