Which three statements are true regarding persistent lightweight jobs？（）

• A、 Persistent lightweight jobs modify several tables in the data dictionary to generate a lot of redo.
• B、 The user cannot set privileges on persistent lightweight jobs.
• C、 Persistent lightweight jobs are useful when users need to create a large number of jobs in a short time.
• D、 Persistent lightweight jobs are useful when users need to create a small number of jobs that run infrequently.
• E、 The use of a template is mandatory to create persistent lightweight jobs.