Which three statements are true about persistent configuration？（）  

• A、 A user cannot set privileges on the persistent lightweight jobs
• B、 Persistent lightweight jobs generate a large amount of metadata
• C、 It is possible to create fully self-contained persistent lightweight jobs
• D、 The use of a template is mandatory to create persistent lightweight jobs
• E、 Persistent lightweight jobs are useful when users need to create a large number of jobs in a short time