Answer: a. They originated in China under the Ming Dynasty.
Explanation:
What does this term mean ?
It defined in two ways firstly its a law created through decisions taken by the court and not by the state.
It is a doctrine in which all the decisions taken in high court are based on it.
Where did it originate from ?
The common law legal system was first established in England and was later endorsed by the United State and Canada.
It is based on the opinions by the judges which are recorded down in order to make references to them in future court judgements.