Researchers wanted to understand what kind of strangers babies are afraid of, and conducted experiments on babies from 7 to 19 months of age. The experiments showed that babies showed positive, mild responses to strange children, but were more afraid of strange adults, and distance The nearer the negative emotions, the greater the negative emotions. In further experiments, the researchers allowed these babies to be with strange adults, dwarfs, and children, and found that the babies were more afraid of strange adults than dwarfs. Which of the following, if true, would most undermine the findings? ['Babies are less afraid of dwarfs than strange adults.', "Babies' response to strange children also changes with relative distance.", "Babies' response to strangers is more susceptible to stranger gender.", 'Older infants are less afraid of strange adults than younger infants.']