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What is the purpose of a two - phase commit protocol? A . To ensure consistent database state during committing of changes B . To

What is the purpose of a two

-

phase commit protocol?

.

To ensure consistent database state during committing of changes

.

To save only changes in a central database

.

To save changes made to a database that were not saved before a power outage

.

To reserve any changes made by a user

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