What Is the Meaning of the Individual Boxes on an Organization

What is the meaning of the individual boxes on an organization chart?

A) Each box is appropriately labelled as a function or a process in the flow of materials/services.
B) Each box represents a job within the company.
C) Each box indicates a different geographical departmentalization.
D) Each box represents a group of people.
E) Each box represents a product or service provided by the organization.