Step 1: Understanding the Question:
The question asks to identify the country from the options that has an unwritten constitution.
Step 2: Key Concept:
An 'unwritten' constitution does not mean there are no written documents. It means there is no single, codified document that serves as the supreme law of the land. Instead, the constitution is a collection of various sources.
Step 3: Detailed Explanation:
Britain (the United Kingdom) is the most prominent example of a country with an unwritten constitution. The British constitution is made up of:
- Statute Law: Acts passed by the Parliament (e.g., Magna Carta, Bill of Rights 1689, Parliament Acts).
- Common Law: Judge-made law based on precedents.
- Conventions: Traditional and accepted rules that regulate political practice.
- Works of Authority: Authoritative legal and constitutional texts.
In contrast, the constitutions of the USA, France, and China are all written, codified documents.
Step 4: Final Answer
Britain's constitution is unwritten.