According to the passage, who is a baby most likely to be comfortable with?

Recently a five-year study was conducted by the Center for Childhood Development in Los Angeles, California regarding the way babies react to different types of people. The findings of the study suggest that infant children seem to be more comfortable around other babies than they axe with strange adults.
     The result confirms the ideas of Dr. Richard Perelman, a well-known pediatrician, who has written many books about raising children. Dr. Richard Perelman supports the findings of the study and adds that it is a sounder idea to keep children with other children, as in a day care center, than it is to have children cared for by a baby-sitter.
     According to the results of the study, infants benefit from being in the company of other babies on a daily basis. Whereas some babies seem to show fear of strange adults. They are likely to reach out to try to touch an unfamiliar baby. The study even suggests that children as young as one year old can form friendships.