Which documents must be maintained in each resident's file according to Title 22?

The correct answer references the essential documents that are required to be maintained in each resident's file according to Title 22 regulations. Admission agreements establish the terms and conditions of a resident's stay, ensuring that both the facility and the resident understand their rights and responsibilities. Service plans are crucial as they outline the individualized care and services that each resident will receive, tailored to their specific needs. Medical assessments provide important health information about the resident, which is necessary for managing their care appropriately and monitoring any changes in their health state.

The combination of these three types of documents ensures thorough documentation of the resident's relationship with the facility, their care regime, and their ongoing health needs, which aligns with best practices for accountability and quality care in adult residential facilities. Maintaining these records not only complies with regulatory standards but also supports effective communication and coordination of care among staff and healthcare providers.

Other options do not encompass the complete and mandated documentation required by Title 22. For instance, while birth certificates might be important for identity verification, they are not a standard requirement for the ongoing maintenance of a resident's file. Similarly, while medical assessments are indeed important, having only these without admission agreements and service plans does not meet the comprehensive requirements established by the regulations.