For His Research Methods Class Project, Hiro Is Studying the Effect

For his research methods class project, Hiro is studying the effect of pet ownership on stress levels. Although a lot of research has been done on dog and cat owners, not much is known about other pets so Hiro decides to study bird owners. Which of the following would demonstrate a snowball sampling technique?

A) He contacts the Twitter followers of Dr. Oiseau, a famous biologist who studies birds.
B) He recruits bird owners by e-mailing members of the National Bird Owners Association and asking for participants.
C) His participants are all the people who have purchased birds at his local pet store in the past 6 months.
D) He asks bird owners to give him the names of other bird owners.

Correct Answer:

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