Select the Scenario That Is Using Snowball Sampling

Select the scenario that is using snowball sampling.

A) All of the students taking Spanish were asked how often they speak the language outside of class.
B) Will ran an ad in the local newspaper asking for people to participate in marketing research.
C) After Soumya completed the survey on tea preferences, she recommended her friend to the surveyor because they both liked the same brand of tea.
D) Yolanda stopped every other person coming out of the store and asked them to complete a questionnaire.
E) A firm decides to poll people in the grocery story who are between the ages of 40 and 50 to ask about their shopping habits.