Final answer:
Creative Commons has a system of licenses and tools that allow creators to retain copyright while permitting others to copy, distribute, and remix their work.
Step-by-step explanation:
The correct answer is D. All of the above.
Creative Commons has a system of licenses and tools that allow creators to retain copyright while permitting others to copy, distribute, and remix their work. Attribution is an essential part of using Creative Commons-licensed material as it requires giving appropriate credit to the original creator.