You install Windows 2000 Professional on an existing department’s computer setup, which was using Windows NT 4.0 Workstation. Later you are told that a dial-up connection will be needed to access a local Internet Service Provider. When you open the computer that connects to the ISP, you find that a 33.6k modem has already been installed. But the users insist, that you also install a faster 56k modem. After installing the new modem and rebooting the computer, you notice that there is a conflict between the two modems. How do you resolve this situation?（）

A. Disable the 33.6 K modem.
B. Disable the 56 K modem
C. Disable the Com port 2
Disable Com port 4
E. Run Windows update， this will update this 33.6 K modem drivers.