Your network consists of a single Active Directory domain. All servers run Windows Server 2008 R2. All client computers run Windows 7. Some users have laptop computers and work remotely from home. You need to plan a data provisioning infrastructure to secure sensitive files. Your plan must meet the following requirements: èFiles must be stored in an encrypted format. èFiles must be accessible by remote users over the Internet. èFiles must be encrypted while they are transmitted over the Internet. What should you include in your plan?（）

A. Deploy one Microsoft SharePoint Foundation 2010 site. Require users to access the SharePoint site by using a Secure Socket Transmission Protocol （SSTP） connection.
B. Deploy two Microsoft SharePoint Foundation 2010 sites.Configure one site for internal users. Configure the other site for remote users. Publish the SharePoint sites by using HTTP
Configure a Network Policy and Access Services （NPAS） server to act as a VPN server. Require remote users to access the files by using an IPsec connection to the VPN server.
D. Store all sensitive files in folders that are encrypted by using Encrypting File System （EFS）. Require remote users to access the files by using Secure Socket Transmission Protocol （SSTP）.