You want to perform the following operations for the DATA ASM disk group：
-Verify the consistency of the disk. 
-Cross-check all the file extent maps and allocation tables for consistency. check whether the alias metadata directory and file directory are linked correctly. 
-Check that ASM metadata directories do not have unreachable allocated blocks.  
Which command accomplishes these tasks（）？

A. The source and target platforms must be the same
B. Redo logs，control files and temp files are also transported
C. The transported database must have the same database identifier （DBID） as the source database and cannot be changed
D. The COMPATIBLE parameter must be set to 10.0.0.0 or higher and the database must be opened in readonly mode before being transported
E. Recovery Manager （RMAN） is used to convert the necessary data files of the database if the target platform is different and has different endian format

A. A DBA can enable or disable an individual task in all maintenance windows.
B. A DBA cannot change the duration of the maintenance window after it is created.
C. In case of a long maintenance window，all Automated Maintenance Tasks are restarted every four hours.
D. A DBA can control the percentage of the resource allocated to the Automated Maintenance Tasks in each window

A. Set DYNAMIC_SAMPLING to level 4
B. Set the STATISTICS_LEVEL parameter to BASIC
C. Set the INCREMENTAL value to TRUE for the partition table
D. Increase the value of STALE_PERCENT for the partition table