Step 1: Understanding patriarchy.
Patriarchy refers to a social system where men hold primary power in various areas of life, such as in the family, political leadership, and moral authority. In a patriarchal system, the father typically holds the most authority and plays a dominant role in decision-making.
Step 2: Conclusion.
Thus, patriarchy refers to the "rule of father" (A), where men, especially fathers, exert control over family and societal structures.