The SET CONTROLFILE AUTOBACKUP FORMAT command， which you can specify either within a RUN block or at the RMAN prompt， overrides the configured autobackup in the session only. 
What is the order of precedence？（）
1. SET within RUN 
2. SET at RMAN prompt 
3. CONFIGURE

A.The listener hands the connection request directly to a dispatcher. 
B.A dedicated server inherits the connection request from the listener. 
C.The client connects to a dedicated server directly using a protocol address provided by the listener. 
D.The application initiating the session spawns a dedicated server process for the connection request. 
E.The listener issues a redirect message to the client, containing the protocol address of a dispatcher. The client then terminates the network session to the listener and establishes a network session to the dispatcher, using the network address provided in the redirect message. 

A.Shut down the database, restore the two data files and then start up the database. 
B.Take the system and users tablespace offline, restore the two data files, recover the two datafiles, and then bring the SYSTEM and USERS tablespaces online. 
C.Shut down the database, restore the two data files, start up the database in MOUNT mode, recover the two data files, and then alter the database open. 
D.Take the SYSTEM and USERS tablespaces offline, recover the two datafiles and then bring the SYSTEM and USERS tablespaces online.

A.CHANGE
B.RESYNC
C.CATALOG
D.CROSSCHECK