Answer:
The correct answer is Culture.
Step-by-step explanation:
In psychology, culture is a very important subject of study and it's focused mainly on "the study of the way cultural traditions and social practices regulate, express, and transform the human psyche, resulting less in psychic unity for humankind than in ethnic divergences in mind, self, and emotion." As said by Richard Shweder so when we talk about rules, values, beliefs and attitudes of a certain community we are necessarily referring to Culture because of the social practices involve in the things studied by the psychologist in the question.