Participant observation is the research technique that would most likely be used by a symbolic interactionist.
The research technique that would most likely be used by a symbolic interactionist is b) Participant observation.
Symbolic interactionism is a sociological perspective that focuses on how individuals shape and are shaped by their social interactions. Participant observation involves the researcher directly observing and participating in the social interactions and behaviors of the group being studied. This method allows the researcher to gain a deep understanding of the meanings and symbols that individuals use to interact with each other, which aligns with the core principles of symbolic interactionism.