Final answer:
Works published before 1923 are not subject to copyright due to expiration, impacted by evolving U.S. copyright laws and public domain regulations.
Explanation:
Materials published before 1923 are not subject to copyright due to the expiration of copyright protection. The original intent of copyright law was to protect an author's rights, but as laws evolved, works entered the public domain at different times based on copyright regulations.
U.S. copyright laws have been revised over the years, impacting when works enter the public domain. For example, works created before 1978 had a 28-year protection that could be renewed, while certain works have entered the public domain earlier due to updates in laws.
Public domain materials include US government documents, works created before 1926, and books published 95 years ago in the US, among others. Understanding copyright laws and expiration dates is crucial in determining a work's copyright status.
Learn more about Copyright laws and public domain regulations here:
https://brainly.com/question/10633820
