Which of the following is a disadvantage of using ethnography as a method of social research?

A) Participants are self-selected.
B) Participants are not completely honest when asked to describe their attitudes and behaviors.
C) It is difficult for another researcher to repeat or replicate any particular ethnography.
D) Ethnographies tend to have ethical problems that are of central concern to most sociologists.

Ethnography is a time-consuming and intensive method that often involves extensive fieldwork, which makes it difficult for another researcher to repeat or replicate any particular ethnography. This poses a challenge to the reliability and validity of the research findings. Additionally, while participants may be selected based on certain criteria, they are not necessarily representative of the larger population, which limits the generalizability of the research. However, A, B, and D are also potential disadvantages of using ethnography.