A social class is a grouping of people into hierarchical social divisions, the most frequent of which are the high, middle, and bottom classes.
Reputational method: Members of the society are asked to rank other members of the society based on what they know about their personality and culture.
Subjective method: People are asked to evaluate their own social standing using a subjective method.
Objective method: Wealth, profession, and schooling are used to define social class.
Thus, Option D is the correct option that is all of the above.
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