Which statement is true when Automatic Workload Repository （AWR） baselines are created using baseline templates？（）  

• A、 AWR baselines are always created as repeating baselines.
• B、 AWR baselines can be created on the basis of two time values.
• C、 AWR baselines are always created with infinite expiration duration.
• D、 AWR baselines are always created using the Automatic Workload Repository （AWR） retention period as expiration duration.