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

A.Create two Exchange Server 2003 computers. Place the mailboxes for main office users on one server， and place the mailboxes for remote users on the other server
B.Create a Network Load Balancing cluster that contains two Exchange Server 2003 computers. Place half of the user mailboxes on one server， and place half of the user mailboxes on the other server
C.Create a Microsoft Cluster Server cluster that contains two Exchange Server 2003 computers. Place all of the user mailboxes on one server and configure the other server as a failover node
D.Create a Microsoft Cluster Server cluster that contains two Exchange Server 2003 computers. Place half of the user mailboxes on one server， and place half of the user mailboxes on the other server