The correct answer is D) Functionalist theory.
The assimilation perspective argues that in order to be full members of society members of minority groups must adopt as many aspects of the dominant culture as possible. This perspective pertains to the Functionalist sociological theory.
In sociological terms, the Functionalist theory was developed by sociologist Emile Durkheim, who expressed his interest in understanding how a society maintained its stability. This theoretical approach states that society is the sum of its parts and beyond. And each member or institution of society has to do their part for the benefit of the whole. Society is an "organism" in which every part has a specific function. If one fails, the other parts have to do more to cover that function.
