Answer:
C) Observation of public behaviour when the researcher.
Step-by-step explanation:
Public Behaviour alludes to conduct occurring in a freely available area where the subject doesn't have a desire for security (e.g., an open square or park, a road, a structure campaign, an administration building).
In the event that subjects have a sensible desire for protection (e.g., restorative test room, private office) at the area where the analyst is leading the perception, the undertaking may not be viewed as excluded.