问题：

[单选]

You are the desktop administrator for your company. The company's network contains a RIS server, a DHCP server, and a DNS server. You need to install Windows XP Professional on a computer that does not have a CD-ROM drive. The computer has the following configuration: a Pentium III 1-GHz processor, a 5-GB hard disk, 128 MB of RAM, a modem in the first PCI slot ,an Ethernet card in the last ISA slot. You attempt to install Windows XP Professional on the computer by using a RIS bootable floppy disk. However, you are unable to connect to the RIS server.
What should you do?（） 

A . Move the Ethernet card to the first ISA slot. 
B . Remove the Ethernet card and replace it with an Ethernet card that is PXE compliant. 
C . Share the RIS image on the RIS server. Create a network bootable floppy disk. Insert the floppy disk, and install Windows XP Professional from the share. 
D . Place the NDIS network drivers in the root directory of the RIS bootable floppy disk. Use the floppy disk to connect to the RIS server.&e