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Selecting the victim to be rollbacked to the previous state is determined by the minimum cost. The factors determining cost of rollback is | |
A. | How long the transaction has computed, and how much longer the transaction will compute before it completes its designated task [Wrong Answer] |
B. | How many data items the transaction has used and how many transactions will be involved in the rollback [Wrong Answer] |
C. | How many more data items the transaction needs for it to complete. [Wrong Answer] |
D. | All of the above [Correct Answer] |