（单选题）
You enable block change tracking. You issue the following command： BACKUP INCREMENTAL LEVEL 0 DATABASE； The next day，you issue the following command： BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE； Which statement about the use of the change tracking file is true？（）
A RMAN reads the block change tracking file only when it performs the incremental level 0 backup.
B RMAN reads the block change tracking file when it performs both incremental backups.
C RMAN reads the block change tracking file only when it performs the incremental level 1 backup.
D RMAN does not read the block change tracking file when it performs either incremental backup.
正确答案
答案解析
略
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