Which of the following describes the term "declassification"?

The term "declassification" refers to the process of making classified information no longer classified. This process involves officially removing the classification status that protects sensitive information, allowing it to be accessed by the public or individuals without the appropriate security clearance. Declassification is a crucial part of information management because it ensures that information which no longer requires protection can be openly shared, aligning with transparency and accountability in governmental operations.

In contrast, options that involve upgrading classification levels, authorizing access to classified material, or reviewing documents for compliance do not accurately capture the essence of declassification. These activities serve different purposes within the realm of information security, focusing on either increasing protection, regulating access, or ensuring adherence to policies rather than reversing the classification status itself.