How Do Institutions, Such as the Workplace, Places of Worship

How do institutions, such as the workplace, places of worship, schools, family, and the like maintain the hierarchy of social inequality?

A) Institutions consist of rules and structures that define what is permissible and what is not, and what is a legitimate issue or problem and what is not.
B) Institutions consist of bureaucracies that control the message and so are the center of power. Increasingly, social inequality is a bureaucratic construct.
C) They do so via professionals who create a hierarchy of information, its interpretation, its application in power relationships, and, so legitimate the social structure.
D) Institutions do so by hiring individuals with biases that increase inequality.