View the Exhibit and note the files available in the $ORACLE_HOME/dbs folder. The ASM instanceis already running. You used the following steps to start the database instance and open the database：
 
Which file is used to start the instance in this case（）

A.The online redo log files and online data files are opened.
B.All the online data file headers are checked for consistency.
C.Instance recovery is performed before opening the database.
D.The path and existence of all the log file members are checked

A.renaming the control files
B.re-creating the control files
C.dropping a user in your database
D.dropping a tablespace in your database
E.configuring the database instance to operate in the ARCHIVELOG or NOARCHIVELOG modes

A.The SGA_TARGET is a static parameter.
B.The instance is started， but the database is not yet open.
C.The server parameter file （SPFILE） was used to start the instance.
D.The SGA_TARGET parameter does not have any effect onthe databaseinstance untiltheSGA_MAX_SIZE parameter is specified.