Which of the following reflects an example of improper information handling?

Classifying information at the wrong level is a clear example of improper information handling because it compromises the integrity and confidentiality of sensitive material. Classification levels are designed to protect information based on its sensitivity and the potential impact of unauthorized disclosure. When information is classified improperly, it can lead to various security risks, such as exposing classified data to unauthorized personnel or unnecessarily restricting access to information that could be shared, thereby affecting operational efficiency. Proper classification is essential for maintaining the appropriate protections around sensitive information, and errors in this process can have serious repercussions for national security.

In contrast, the other options reflect appropriate approaches to information security. Returning classified documents after use ensures that sensitive information is secured once it is no longer needed. Keeping records of container access is a best practice for tracking who has accessed classified materials, which helps maintain accountability and security. Ensuring proper security measures are in place directly relates to safeguarding classified information, reinforcing the importance of following established protocols and guidelines.