How is classified information marked?

Classified information is marked with specific classification levels and applicable handling instructions to ensure proper protection and compliance with security protocols. This method of marking provides clear guidance on how the information should be treated, who can access it, and the consequences of unauthorized disclosure. Different levels of classification, such as Confidential, Secret, and Top Secret, indicate the sensitivity of the information and the potential impact of its unauthorized release. Additionally, these markings often include handling instructions that provide further details on storage, transmission, and sharing to mitigate risks associated with sensitive data. This structured approach helps maintain the integrity of national security and is essential for those who manage classified information to understand. The other options do not adequately account for the nuances of classified information handling and emphasize incorrect or incomplete methods of marking.