The situation that is an example of a patriarchy is "The acknowledged head of the Thorne family is a man." Option B is correct.
Patriarchy is understood as a social system in which men have primary power and predominate in roles of political leadership, moral authority, social privilege and control of property. Patriarchy refers to the dominance of men over women in different spheres.
Patriarchy has existed in the social, legal, political, religious, and economic organization of a range of different cultures.