Which of the following spaces is unauthorized for visitors?

Staterooms are designated as private spaces primarily for crew members or specific personnel, making them unauthorized for general visitors. Access to these areas is restricted to maintain privacy and security for those residing there, ensuring that only authorized individuals can enter. This policy is crucial in maintaining operational integrity and safeguarding personal belongings. The other spaces, such as the library, dining hall, and observation deck, are typically more open and meant for visitors, allowing for social interaction and engagement among crew members and guests. In contrast, the staterooms serve a specific purpose that necessitates limited access to maintain a secure and private environment.