Concept:A unitary system of government concentrates all sovereign power in a single central authority.
Explanation:A unitary system works best in a country that has a small geographical area and a homogenous population.
When citizens share the same language, culture, and historical background, the central government can easily make laws that apply equally to everyone.
Administrative units in such a country only exercise powers that the central government delegates to them.
This arrangement avoids unnecessary duplication of governments and reduces the cost of administration.
Large, diverse, or sparsely populated nations usually face challenges that require federalism or decentralisation to manage regional differences effectively.
Therefore, a small and culturally unified nation is the most suitable environment for a unitary government to operate successfully.
Answer:B. with a relatively small area and a homogenous population