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（）
- Ait provides synchronous mirroring on both sides
- Bit can be implemented withoutFlashCopy volumes at the target site
- Cwith Global Mirror， the Metro Mirror functions can be used over continental distances
- Dit has almost no impact on application performance because of its extremely short andadjustable coordination time