单选题A customer needs a remote data copy， data migration， and off-site backup solution. The solution cannot impact application performance. The sites are over continental distances. Which characteristic of DS8700 Global Mirror makes it a good fit for this
题目
单选题
A customer needs a remote data copy， data migration， and off-site backup solution. The solution cannot impact application performance. The sites are over continental distances. Which characteristic of DS8700 Global Mirror makes it a good fit for this customer（）
A
it provides synchronous mirroring on both sides
B
it can be implemented withoutFlashCopy volumes at the target site
C
with Global Mirror， the Metro Mirror functions can be used over continental distances
D
it has almost no impact on application performance because of its extremely short andadjustable coordination time
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