Answer:
The correct answer is - D. All of these research methods apply.
Step-by-step explanation:
The participant-observation research method is a qualitative research method and also an observational research method as in this researcher studies or interviews a group of subjects not only by observing the subject group but also by participating in the activities of the group.
In this case, the researcher observes and interviews the male participants while wearing a pink t-shirt and holding a sign as a participant to know why men were marching at a recent women’s March.