You purchase a USB board, ISDN terminal adapter for your Windows 2000 Professional portable computer. You plug the device in to the USB port. Plug and Play fails to detect the new device. You test the device on a Windows 2000 Professional desktop computer. You find that plug and play correctly detects the device. You want to resolve the problem so that you can use ISDN terminal adapter on your portable computer.   What should you do?（）

• A、Use the Device Manager to enable the USB manager root hub.
• B、Use the Device Manager to enable the USB host controller in the current hardware profile.
• C、Contact the hardware manufacturer to obtain the upgrade for the Plug and Play BIOS.
• D、Turn off the computer plug in the ISDN terminal host adapter and restart the computer.