Which is the source used by Automatic SQL Tuning that runs as part of the AUTOTASK framework?

Which is the source used by Automatic SQL Tuning that runs as part of the AUTOTASK
framework?

A.
SQL statements that are available in the cursor cache and executed by a user other than
SYS

B.
SQL statements that are part of the available SQL Tuning Set (STS) only

C.
SQL statements based on the AWR top SQL identification

D.
SQL statements that are part of the AWR baseline only

Explanation: