单选题What advantage would you get if you increase the length of time during which the undo information would be stored in the database？（）Aroll back of large transactionsBroll forward to redo a transactionCdata concurrency for large updatesDread consistency for long-running transactions
单选题
What advantage would you get if you increase the length of time during which the undo information would be stored in the database？（）
A
roll back of large transactions
B
roll forward to redo a transaction
C
data concurrency for large updates
D
read consistency for long-running transactions
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