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The Database Resource Manager is automatically enabled in the maintenance window that runs the Automated Maintenance Task. What is the reason for this?（）
A:to prevent the creation of an excessive number of scheduler job classes
B:to allow the Automated Maintenance Tasks to use system resources without any restriction
C:to allow resource sharing only among the Automated Maintenance Tasks in the maintenance window
D:to prevent the Automated Maintenance Tasks from consuming excessive amounts of system resources

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出自：Oracle认证

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