Your company has just upgraded its CATAGORY 5 Ethernet network from 10Mbps to 100Mbps. After the upgrade， the 20 Windows 2000 Professional computers in the marketing department can no longer connect to the network. The remaining 80 Windows 2000 computers in the company can connect， however. Your company uses NWLink as the only network protocol.You need to connect the computers in the marketing department to the network. What must you do？ （）

• A、Configure the NWLink frame type of the network adapters to be ethernet 802.3.
• B、Configure the NWLink frame type of the network adapters to be ethernet II.
• C、Replace the network adapters with 10/100 BNC adapters.
• D、Replace the network adapters with 10/100 UTP network adapters.