You are the administrator for a network that runs Windows Small Business Server (SBS) 2011 Standard. Users are able to connect to your companys SharePoint website from both inside the network and by using Remote Web Access. A new security policy includes the following requirements: Users must not have direct access to SharePoint from outside of the network. Users must have access to SharePoint from the corporate LAN. You need to enforce the new security policy. What should you do?

A.
Block port 444 on the network gateway device.

B.
Block port 987 on the network gateway device.

C.
Remove all users from the Windows SBS Sharepoint_VisitorsGroup security group.

D.
Remove all users from the Windows SBS Sharepoint_MembersGroup security group.