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The following Qos description about CPU and memory resources is incorrect.

The following Qos description about CPU and memory resources is incorrect.
A . Memory resources QOS is used to ensure that business-critical virtual machines can get sufficient memory resources
B . CPU shares and CPU reservations work only when each virtual machine competes for computing resources
C . The CPU QoS of the virtual machine is used to ensure that the computing resources of the virtual machine are reasonably allocated
D . Memory resource QoS can only be used after the memory reuse switch is enabled

Answer: D

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