You need to design a configuration for the Microsoft Outlook Web Access servers. What should you do？（）

• A、Create a Network Load Balancing cluster that contains the Outlook Web Access servers
• B、Create a Microsoft Cluster Server cluster that contains the Outlook Web Access servers
• C、Create public DNS host （A） resource records for each Outlook Web Access server. Instruct each user to connect to the server that contains his or her mailbox
• D、Install Microsoft Application Center 2000 on the Outlook Web Access servers. Create a Web cluster that contains all of the Outlook Web Access servers