In Festinger, Schachter, and Back's study they found that those that were likely to be friends were the people one door away from each other.
The study that was conducted by these three people established that the residents were most likely to be friends with the people that lived closest to them.
According to the study these students made friends due to proximity in the school.
Read more on the study here:
https://brainly.com/question/13082496?referrer=searchResults