A customer has two single cluster IBM TS7700 Virtualization Engines at the same site. The customer wants to move one to a remote site and set up a grid configuration with the two clusters. The customer has fibre between the two sites. What is the most important factor to consider when planning the new configuration?（）

• A、operator training
• B、cache size of the two clusters
• C、fibre bandwidth capability between the sites
• D、number of stacked tape drives attached to each cluster