Which XenDesktop feature will reduce the likelihood of application or desktop disruption during a database outage?

Session lingering keeps an application session running after a user closes the last app in the session to speed up future launches, but provides no resilience during a database outage.

Session Reliability keeps ICA sessions alive and the display frozen during a network interruption between the client and the VDA, and is unrelated to database availability.

Connection leasing stores lease files on Delivery Controllers that contain recent connection information for users and their entitled resources. During a database outage, the Controller uses these cached leases to broker new and reconnecting sessions without requiring a live database query, significantly reducing application and desktop disruption for end users.

Session pre-launch starts a session before the user requests it to reduce logon time, but does not provide any protection against database outages.