One of the Defining Characteristics of a Functional Organizational Structure

One of the defining characteristics of a functional organizational structure is that it:

A) has a narrow span of control and high degree of formalization and centralization.
B) is the only structure that organizes employees around specific knowledge or other resources.
C) overlays two organizational structures in order to leverage the benefits of both types of structure.
D) uses self-directed work teams rather than individuals as the basic building block of organizations.
E) is an alliance of several organizations for the purpose of creating a product or serving a client.