While working on the database， you receive the following error：        01578： ORACLE data block corrupted （file# 6， block # 54）        ORA-01110 ： data file 6： ’u01/oracle/oradata/data1.dbf’   You decide to recover the corrupted data block by using the Block Media Recovery feature. Which option is NOT a disadvantage of using block media recovery？（）

• A、 Block Media Recovery must be used with RMAN.
• B、 You must perform complete recovery of individual blocks.
• C、 You must have a full RMAN backup， not an incremental backup.
• D、 You must use the DBVERIFY utility before using the Block Media Recovery feature.