You need to design a security strategy for a remote e-mail access. 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 Authenticatio