Answer:
Behavioral Perspective
Explanation:
The fact that "small changes are introduced in the child's environment" can be taken as a good example of behavioral perspective since the ones that work with this idea consider that evironment has an important influence in behavior. They have the conception that when interacting with a given environment an individual can develop certain attitudes and responses.
Social conformity can peer pressure you, self discipline can influence you do date or not deciding on what you believe you deserve. And impulse versus delayed gratification can influence you by making drastic and not very though out decisions.
If the level is moderate. that's the answer.
The correct answer would be D. B and C.
Hope this helps :D