You are the administrator of your company’s network. Your network consists of 20 Windows 2000 Professional computers. You want to configure all of the computers to allow access to the Internet. Your Budget does not allow for installing a permanent Internet connection for the network. You do have a single dial-up account at a local Internet service provider （ISP） and a 56-Kbps modem. You want the computer to be able to access the Internet when web resources are requested. What should you do？（）

A. Configure the shared modem to use software handshaking
B. Configure the dial-up connection to enable on-demand dialing.
Configure the dial-up connection to enable the Internet connection sharing.
D. Configure all the other computers to have a dial-up connection that uses the shared modem.
E. Attach the modem to one of the Windows 2000 Professional computer， and create a dial-up connection to the IS
F. Attach the modem to one of the Windows 2000 Professional computers， and share the modem on the network.