Which of the Following Is Not an Example of Ethnographic

Which of the following is not an example of ethnographic research?

A) A researcher joins an organization and records how often women speak at meet- ings over the course of a year.
B) A graduate student interviews members of campus diversity organizations over several weeks about why they decided to join.
C) Staff from the university human resources office send a survey to staff about their experiences with discrimination.
D) White and Black undergraduates serve as "secret shoppers" and secretly vide- otape their interactions with salespeople.