单选题According to your backup strategy， you performed an incremental level 0 backup of your database. Which statement regarding this backup is true？（）AThe backup is similar to image copy.BThe backup contains all used data blocks.CThe backup contains only unused data blocks.DThe backup contains all data blocks changed since the last incremental level 1 backup.
单选题
According to your backup strategy， you performed an incremental level 0 backup of your database. Which statement regarding this backup is true？（）
A
The backup is similar to image copy.
B
The backup contains all used data blocks.
C
The backup contains only unused data blocks.
D
The backup contains all data blocks changed since the last incremental level 1 backup.
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