单选题The datafiles of your database are ASM files. You are performing a check for datafile block corruption by using the DBVERIFY utility. What is a prerequisite for checking block corruption on an ASM datafile by using the DBVERIFY utility？（）A The block change tracking feature must be enabled.B OMF must be configured on your database.C The database must be in ARCHIVELOG mode.D A USERID must be supplied.
单选题
The datafiles of your database are ASM files. You are performing a check for datafile block corruption by using the DBVERIFY utility. What is a prerequisite for checking block corruption on an ASM datafile by using the DBVERIFY utility？（）
A
The block change tracking feature must be enabled.
B
OMF must be configured on your database.
C
The database must be in ARCHIVELOG mode.
D
A USERID must be supplied.
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