Final answer:
The mechanistic model of organization typically includes rigid departmentalization, demonstrating a formal, hierarchical structure with centralized management, narrow spans of control, and high specialization.
Step-by-step explanation:
A characteristic of the mechanistic model of organization is B) rigid departmentalization. This model is often aligned with the classic bureaucratic structure as described by sociologist Max Weber. Mechanistic organizations are characterized by a hierarchical structure, which includes a high degree of formalization, centralized management, narrow spans of control, and high specialization.
Contrarily, a low level of formalization, decentralized management, and wide spans of control are features more commonly found in organic organizational structures, which are typically more flexible and adaptable to change.