（单选题）
Using Oracle Scheduler you have scheduled two jobs， JOB_Aand JOB_B， to run at 9：00 p.m. every Friday. You want both the jobs to use a single resource plan， WEEKEND_PLAN. Which task must have already been performed to enable you to achieve this objective？（）
A A window must have been created with the WEEKEND_PLAN resource plan.
B A program must have been created with the WEEKEND_PLAN resource plan.
C A job class must have been created with the WEEKEND_PLAN resource plan.
D A window group must have been created with the WEEKEND_PLAN resource plan.
正确答案
答案解析
略
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