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单项选择题A customer asked a consultant to create the infrastructure for an application.  The application is designed to charge customers for conferencing services based on usage.  To determine if a Storage Area Network （SAN） is the best storage solution， which of the following questions is most appropriate？（）

A、Will the application require a database？

B、Which operating system does the application require？

C、Will the data need to be backed up in real time？

D、Does the application share data among the servers？

  • D

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