You work as a network administrator at ABC.com. The ABC.com network consists of a single domain named ABC.com. All servers on the ABC.com network have Windows Server 2012 R2 installed.The network as a server named ABC_SR05 that provides DHCP services.You need to create the DHCP scopes to support a subnet that has 800 hosts.You want to minimize the number of unused IP addresses on each subnet. How would you configure DHCP to support these subnets？（）