Final answer:
The correct answer is Behavioral psychologists.
Step-by-step explanation:
The correct answer to the question is b) Behavioral psychologists.
Behavioral psychologists tend to focus on environmental or external influences that impact individual behavior. They believe that behaviors are learned through interactions with the environment and that the environment plays a significant role in shaping behavior. They study how factors such as rewards, punishments, and conditioning affect behavior. For example, a behavioral psychologist might study how positive reinforcement, such as praise or rewards, can influence a person's motivation and behavior.