A customer is planning on establishing a Global Mirror between two Storwize V7000 storagearrays. The customer is planning to lease an IP WAN connection between sites for the tasks andis running a SAP （database） application on Oracle. Which of the following planning considerationsis most important？（）

• A、the distance between sites needs to be less than 100 kilometers
• B、consistency groups should be created to maintain write order on the remote mirror
• C、ensure sufficient bandwidth exists on the link based on average application workloads
• D、ensuring a low round trip latency of less than 30ms on the WAN connection is required