Final answer:
The principle of precedent law, or stare decisis, means that similar cases are treated in the same way based on past court decisions to ensure legal consistency.
Step-by-step explanation:
The distinguishing characteristic of the principle of precedent law is D) Like cases should be treated alike. This principle, also known as stare decisis, dictates that courts should follow previous rulings when deciding new cases that are similar in nature.
This ensures consistency and stability within the legal system and respects judicial decisions made in the past. While there is some flexibility for courts to make new precedents, the general rule is to adhere to prior decisions unless there is a strong justification to do otherwise.