You need to design an administrative model that meets the business and technical requirements. What should you do？（）

A.Require remote users to access e-mails by using Outlook Mobile Access
B.Require Outlook Web Access users to install the secure MIME ActiveX-Control and to encrypt all messages
C.On Outlook Web Access servers that accept connections from the Internet configure IIS to require SSL for all connections
D.On Outlook Web Access servers that accept connections from the Internet configure IIS to require Integrated Windows Authentication

A.Place all user mailboxes on back-end servers. Deploy Outlook Web Access on three front-end servers that are members of the Network Load Balancing cluster
B.Place all user mailboxes on back-end servers that are members of a Network Load Balancing cluster. Deploy Outlook Web Access on the back-end servers
C.Place mailboxes for remote users on one back-end server and place all mailboxes for main office users on another back-end server. Deploy Outlook Web Access on the back-end server that contains the mailboxes for remote users
D.Place all user mailboxes on two back-end servers that are members of a Network Load Balancing cluster. Place mailboxes for remote users and mailboxes for main office users into separate storage groups. Deploy Outlook Web Access on three front-end servers. Configure the front-end servers to access only the back-end Network Load Balancing cluster

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