Exam GMAT Topic 1 Question 349 Discussion

Psychologist: People tend instinctively to impose patterns on events even when such patterns are not really present. If early humans believed that a rustle in the grass indicated a dangerous predator when it was just the wind, they were more likely to survive than if they believed that it was just the wind when a dangerous predator was there. Thus, in a world of split-second interactions between predators and prey, a person who made an error of the first type was more likely to survive than a person who made an error of the second type.
So the tendency to make the first type of error is probably due to__________.
Which of the following would, if true, most logically complete the psychologist's argument?