you have a DHCP server named server1 and an application server named server2. Both servers run windows server 2008. The DHCP server contains one scope. You need to ensure that server2 always receives the same ip address. Server2 must receive its DNS settings and its wins settings from DHCP. What should you do?（）

A. Create a multicast scope.
B. Assign a static ip address to server2.
Create an exclusion range in the DHCP scope.
D. Create a DHCP reservation in the DHCP scope.