A User Is Accessing RDS from an Application

Multiple Choice

A user is accessing RDS from an application. The user has enabled the Multi AZ feature with the MS SQL RDS DB. During a planned outage how will AWS ensure that a switch from DB to a standby replica will not affect access to the application?

A) RDS will have an internal IP which will redirect all requests to the new DB
B) RDS uses DNS to switch over to stand by replica for seamless transition
C) The switch over changes Hardware so RDS does not need to worry about access
D) RDS will have both the DBs running independently and the user has to manually switch over