多选题

You started a long transaction. Before committing, you executed a query on one of the tables currently being modified. You received the following error: ORA-01555: snapshot too old How would you prevent such an error in the future?()

Aguarantee undo retention

Badd one more redo log group

Csize the redo log files appropriately

Dsize the UNDO tablespace appropriately

Esize the SYSTEM tablespace appropriately

Fconfigure an appropriate undo retention interval

Gchange automatic undo management to manual

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