Identify four uses of the Oracle Scheduler.（）

A. enables Oracle database to schedule which processes execute on which processors in a multiple CPU environment
B. enables Oracle database to do patches according to a DBA-defined schedule
C. enables you to schedule the execution of jobs based on time
D. enables you to execute jobs in a clustered environment
E. enables you to periodically execute operating systemscript files located on the same server as the database
F. enables you to create a job that makes use of saved programs and schedules
G. enables you to automate the management of the jobs that are created using the DBMS_JOB package