Which of the following is the BEST example of a breach of physical security?

System user IDs being used by multiple individuals is an access control or authentication breach, primarily logical, not physical security.

Printers that do not request user authentication represent a physical security breach because they allow unauthorized individuals direct, unmonitored access to print potentially sensitive documents directly from the device itself. This compromises the confidentiality of information that could be printed and left unattended.

Developers having full access to both development and production environments is a logical access control or segregation of duties issue, not a physical security breach.

Project documentation only kept on a removable device is a data handling or data loss prevention issue, not directly a breach of physical security, though the removable device itself could be subject to physical theft.