What kind of content typically does not require permission to be copied?

Content that is in the public domain is free from copyright restrictions, which means that anyone can use, copy, and distribute it without needing to obtain permission. This typically includes works for which the copyright has expired, works created by the U.S. federal government, and some other specific works that have been designated as public domain. This lack of restrictions makes public domain content a valuable resource for creators who want to use, adapt, or build upon existing works.

The other options do not share this characteristic. Content created within the last five years is still under copyright protection and requires permission for use. Highly technical documents may contain proprietary information or are protected by copyright, necessitating permission. Similarly, confidential company reports are not meant for public use and require explicit consent from the company to be accessed or copied.