Which two options can be the solutions to avoid such errors in future?

A user receives the following error while executing a query:
ORA-01555: snapshot too old
Which two options can be the solutions to avoid such errors in future? (Choose two.)

A user receives the following error while executing a query:
ORA-01555: snapshot too old
Which two options can be the solutions to avoid such errors in future? (Choose two.)

A.
increase the size of the Database Buffer Cache

B.
increase the size of the default temporary tablespace

C.
increase the size of redo log files

D.
increase the size of the undo tablespace

E.
enable the retention guarantee for the undo tablespace



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