You are the network administrator for your company. All servers run Windows Server 2003.  You configure a server named Server2 as a Network Address Translation （NAT） server. Server2 has a single network adapter and a modem. Server2 connects to the Internet through a demand-dial connection. Users report that when they attempt to connect to Internet Web sites， they intermittently receive the following error message： "Page not found." After waiting for several minutes， they can connect to the Web sites. These errors occur throughout the day.  You need to configure Server2 to allow users to always connect to Internet Web sites.   What should you do？（）

• A、Set the demand-dial connection to Persistent.
• B、Set the dial-out hours on the demand-dial connection to any day and any time.
• C、Set a demand-dial filter. Configure the filter for Only allow the following traffic. Specify a new filter for outbound port 80.
• D、Configure the demand-dial interface as the private interface.