A customer is cost-justifying advanced software functions of several disk subsystem vendors.Which of the following software features of the Storwize V7000 are provided at no charge?（）
- A、Easy Tier, FlashCopy, Thin Provisioning
- B、Easy Tier, External Virtualization, FlashCopy
- C、Easy Tier, Metro/Global Mirror, Thin Provisioning
- D、Metro/Global Mirror, FlashCopy, External Virtualization
正确答案:D
答案解析:有
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