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

• A、SQL statements that are part of the AWR baseline only 
• B、SQL statements based on the AWR top SQL identification
• C、SQL statements that are part of the available SQL Tuning Set (STS) only 
• D、SQL statements that are available in the cursor cache and executed by a user other than SYS