An Example of Participant Observation Would Be

An example of participant observation would be:

A) John, a researcher, who watches preschool students who are not aware he is there
B) Mary, a researcher, who visits with a first-grade classroom to conduct a study on teacher-student interactions, and plays an active role in the study.
C) Bill, a researcher, who sits on a park bench and observes behavior without people's knowledge.
D) Sue, a researcher, who observes medical students working on a patient without his or her knowledge that she is present.