You work with a newly created database. Presently， there is no application load on the database instance. You want to create a baseline for tuning the application， so you decide to collect recommendations that can be implemented to improve application performance.  What action must you take to achieve this？（）  

• A、 Run Segment Advisor
• B、 Run the SQL Tuning Advisor （STA）
• C、 Run the Automatic Workload Repository （AWR） report
• D、 Run the SQL Access Advisor with a hypothetical workload