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

A.Create a single storage group. Create one database for all users
B.Create two storage groups. In each storage group， create one database. Place mailboxes for remote users in one storage group database， and place all other mailboxes in the other storage group database
C.Create two storage groups. In each storage group， create one database. Place executive mailboxes in one storage group database， and place all other mailboxes in the other storage group database
D.Create two storage groups. In one storage group， create a database， and place all mailboxes for remote users and executives in the database. In the other storage group， create a database for all other mailboxes