our company has four DNS servers that run windows 2008. Each server has a static ip address. You need to prevent dhcp from assigning the addresses of the DNS servers to DHCP clients. What should you do?（）
A.Create a new scope for the DNS servers.
B.Create a reservation for the DHCP serve.
C.Configure the 005 name servers scope option.
D.Configure an exclusion that contains the ip addresses of the four DNS servers.