Which research technique can be especially helpful when determining the problems that a group of stakeholders feel they face?

A) Participant observation
B) Interviewing
C) Ethnography
D) Focus groups

Focus groups involve a facilitated discussion among a small group of individuals who share common characteristics or experiences. This method can be particularly useful for identifying problems that a group of stakeholders face because it allows them to express their feelings openly and to hear and respond to others' viewpoints, which can help to surface previously unidentified issues or concerns.