Final answer:
In the context of structural-functionalism, the question of who rules America is best answered by 'pluralism,' but G. William Domhoff's views align more with conflict theory, emphasizing the role of wealth in exercising power.
Step-by-step explanation:
Structural-functionalism is a sociological framework, which explains societal structure and power dynamics through the lens of cooperation and interdependence within a society. The question "Who rules America?" is generally answered by functionalists with the option of pluralism, advocating the perspective that power in a society is distributed among multiple groups that compete and cooperate for their interests. According to G. William Domhoff's Who Rules America?, however, wealth is necessary to exert the most influence, aligning more closely with conflict theory which centers on the struggles between social groups over wealth and power, a viewpoint that contradicts the functionalist perspective.