The statement that is true about every public domain work is:
It is not protected by copyright or Creative Commons licenses.
Public domain works are free for anyone to use without permission since they are no longer under copyright protection. The other statements may not universally apply to all public domain works. For example, a public domain work could be less than 100 years old if it has been released into the public domain for other reasons, and not all public domain works are necessarily considered to have great artistic or scientific merit. Additionally, public domain works can encompass a variety of types and genres, not just art, literature, or music.