Which of the following JPA-related statements is false?
a. You can update an existing entity by modifying its entity object in the context of a transaction.
b. Once a transaction is committed, the changes to the entity are saved to the database.
c. You can delete an existing entity.
d. When you commit a transaction the entity is kept as a backup in the database.
d. When you commit a transaction the entity is kept as a backup in the database. Actually, when you commit a transaction the entity will no longer exist in the database.
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