You want to connect to your company network from your Windows 2000 Professional computer at home. You have an ISDN line that is used for internet connectivity. You create a VPN connection and are able to connect successfully to the company network. While connected to the company network, you are unable to access the Internet. What must you do so that you can access the Internet?（）

A. Configure the ISDN connection to use SLIP instead of PP
B. Select the Enable Internet Connection Sharing for this connection check box in the ISDN connection properties.
Clear the Use default gateway on remote network check box.
D. Install and configure the SAP Agent service.