Increasing antibiotic resistance has made it possible for people to die in the future from diseases that are easily cured today. Studies have suggested that ants could be a source of new antibiotics. The establishment of the above conclusion requires the following _______ items as prerequisites. ['Pathogens that attack ants do not develop resistance to antibiotics produced by ants.', 'Ants use chemicals secreted by special glands on their bodies to protect themselves against germs.', 'Chemicals produced by different ants have different bactericidal efficacy.', "Some fungi can release chemical components to hijack ants' nerve center and kill ants."]