An indigenous person tests the physical fitness of newborn babies in order to improve the combat effectiveness of their offspring. They place newborn babies in a harsh natural environment to test their vitality, and abandon those who are weak and cannot stand the test, and leave those sturdy babies. This method did not make the local indigenous people strong but declined. Which of the following is most appropriate as the cause of the eventual failure of local talent selection? ['The physical fitness of newborn babies is good, but they may not be stronger when they grow up.', "Physiological quality is only part of a person's overall quality, and national security requires the improvement of a person's comprehensive quality.", 'Talents are selected, but too few are inevitable.', "The child's parents are unhappy with the brutal selection method and are unwilling to defend their city."]