单项选择题

A.Will the application require a database？B.Which opera……

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？

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A.Is rack space an issue？
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