Why is China a unitary state despite its large size and diverse regions?

A unitary state concentrates governing authority in the national government, which directs law and policy throughout the country. China’s size and regional diversity do not change that structure: regional governments operate under the central government rather than having independent authority to make their own laws. Therefore, the correct choice is “The central government directs all matters of law and policy.”

AI-written and checked against the verified answer.