What Are the Focal Points of the Four Schools of Thought

What are the focal points of the four schools of thought within ethnography?

A) To relieve oppression and empower a group to take action on its own behalf
B) To investigate cultural structures, focusing on groups and their social patterns
C) To construct theories that explain cultural interactions
D) To understand values and thinking that collectively result in behaviors and symbols of the individuals within a culture
E) To provide a comprehensive holistic description of a culture