【单项选择题】
You issue the following statement：  <br /> SQL> SELECT FIRSTNAME， LASTNAME FROM HR.EMPLOYEE； <br /> You receive the following error：        <br /> 01578： ORACLE data block corrupted （file# 6， block # 54）       <br /> ORA-01110 ： data file 6： ’u01/oracle/oradata/data1.dbf’  <br /> How will you resolve this problem of data block corruption by reducing the mean time to recover （MTTR）？（）<p> You issue the following statement：  <br /> SQL> SELECT FIRSTNAME， LASTNAME FROM HR.EMPLOYEE； <br /> You receive the following error：        <br /> 01578
A、A. by using the DBMS_REPAIR package
B、B. by using the DBVERIFY utility
C、C. by using Block Media Recovery
D、D. by issuing the ANALYZE TABLE HR.EMPLOYEES VALIDATE STRUCTURE command
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