You need to design an e-mail access strategy for remote users. What should you do? （） 

• A、 Instruct remote users to connect to their e-mail by using RPC
• B、 Instruct remote users to connect to Outlook Web Access by using only HTTPS
• C、 Instruct remote users to connect to the company network by using PPTP connections
• D、 Instruct remote users to connectd to their e-mail by using RPC over HTTP Configure the HTTP servers to require encryption.