Which tasks are run automatically as part of the Automated Maintenance Task by default?

Which tasks are run automatically as part of the Automated Maintenance Task by default?
(Choose all that apply.)

A.
Segment Advisor

B.
SQL Access Advisor

C.
Optimizer statistics gathering

D.
Automatic SQL Tuning Advisor

E.
Automatic Database Diagnostics Monitor

Explanation:
About Automated Maintenance Tasks (link)
Oracle Database has three predefined automated maintenance tasks:

Automatic Optimizer Statistics Collection—Collects optimizer statistics for all schema objects
in the database for which there are no statistics or only stale statistics. The statistics
gathered by this task are used by the SQL query optimizer to improve the performance of
SQL execution.
See Also:
Oracle Database Performance Tuning Guide for more information on automatic statistics
collection
Automatic Segment Advisor—Identifies segments that have space available for reclamation,
and makes recommendations on how to defragment those segments. You can also run the
Segment Advisor manually to obtain more up-to-the-minute recommendations or to obtain
recommendations on segments that the Automatic Segment Advisor did not examine for
possible space reclamation.
See Also:
“Using the Segment Advisor” for more information.
Automatic SQL Tuning Advisor—Examines the performance of high-load SQL statements,
and makes recommendations on how to tune those statements. You can configure this
advisor to automatically implement SQL profile recommendations.
See Also:
Oracle Database Performance Tuning Guide for more information on SQL Tuning Advisor
By default, all three automated maintenance tasks are configured to run in all maintenance
windows.