Answer:a. functionalist perspective.
Step-by-step explanation:
The functionalist perspective states that society is complex system which functions well through the working together of these systems to enhance solidarity and stability. It focuses on macro-level orientation which makes up the society as a whole structurally and socially ,it focus is on the norms,customs,traditions and Institution all that play role in how the society functions efficiently.
Society according to this perspective determines what behavior is normal and what is deviant behavior,and following the norms of society makes the society function effectively.