Answer: C. Functional
Explanation:
The most commonly used organizational structure is the functional organizational structure. In a functional structure, an organization is divided into departments based on the functions or roles they perform, such as marketing, finance, human resources, and production. Each department is responsible for its specific function, and employees within each department have specialized skills and expertise related to that function. This structure is widely adopted in many organizations as it provides clarity in roles and responsibilities and promotes specialization and efficiency in each functional area.