The best organizational design is the one that

A) emphasizes formal authority, order, fairness, and efficiency.
B) is centralized, with many rules and procedures, a clear-cut division of labour, narrow spans of control, and formal coordination.
C) emphasizes a vertical structure, hierarchy of authority, and promotion based on competency.
D) achieves a good match between structure and situational contingencies.
E) has narrow spans of control and structures of the pyramid form.

The best organizational design is the one that achieves a good match between structure and situational contingencies. This means that the structure of the organization should fit the specific needs and circumstances of the organization at any given time in order to maximize effectiveness and efficiency. A rigid and inflexible structure (such as those described in options A, B, and C) may not be suitable for all organizations in all situations. Therefore, option D is the best choice. Option E is also not a good choice, as narrow spans of control and pyramid structures may not be appropriate for all organizations.