Answer:
B. events in the environment surrounding the depressed person
Step-by-step explanation:
The behaviourists are concerned with observable behaviour as evoked by the environmental events. This they term conditioning. Conditioning is the process that shapes our behavior as evoked by the environment. This school of thought assumes that the internal mental state have little to no effect on human behaviour when compared to environment which shapes and conditions behavior. From this it is easy to see why the psychologist following this school of thought would examine environmental events surrounding the patient.