You want to connect your Windows 2000 Professional computer to multiple TCP/IP subnets on your company’s network. Your computer currently has an ISA network adapter installed. You install a second ISA network adapter. After you restart your computer， you notice that the second ISA network adapter is not functioning. What should you do？（）

• A、Set the driver signing option to block.
• B、Set the driver signing option to ignore.
• C、In the computer’s BIOS， reserve an unused IRQ for ISA devices.
• D、In the Device Manager， configure the second ISA network adapter to use an unused IRQ.