Phil Kunz,a Sociology Professor, Once Performed a Study in Which

Phil Kunz,a sociology professor, once performed a study in which he sent 578 Christmas cards to a sample of complete strangers living in Chicago, Illinois. What happened?

A) Almost none of them sent him a card in return, since they didn't know who he was. However, a small but significant minority ( 8%) were apparently very upset with the researcher.
B) The vast majority of them ( 95%) actually sent him a card in return or telephoned him to try to find out who he was.
C) A significant minority of them ( 20%) actually acted as though they knew who he was and sent him a card in return.
D) Essentially, nothing-although he did receive a handful of cards (three or four) from people who probably mistakenly thought they knew who he was.