Professor Hangnail Wants to Study How People Join a Small

Multiple Choice

Professor Hangnail wants to study how people join a small extremist political organization dedicated to right- wing ideas. He first interviews recent recruits and asks who introduced him/her to the organization. He next interviews the named person and asks who introduced them to the organization, and so forth. What type of sample is the professor using?

A) accidental sampling
B) snowball sampling
C) systematic sampling
D) deviant case sampling