As discussed in the text, the sociologist Phil Kunz once per…

As discussed in the text, the sociologist Phil Kunz once performed a study in which he sent 578 Christmas cards to a sample of complete strangers living in Chicago, Illinois. He received a total of 117 cards in return, as well as several phone calls—despite the fact that he did not know any of these people. Kunz’s findings provide good evidence of ____.​