What purpose would you achieve by enabling the block change tracking feature？（）

• A、 Eliminate the necessity for backups.
• B、 Perform optimized image copy backups.
• C、 Perform optimized incremental backups.
• D、 Enable checkpoint （CKPT） to perform checkpointing at every block change.
• E、 Enable database writer （DBWn） to write changed blocks to data files faster.