A. On DHCP1. create a scope that contains 25 percent of the IP addresses from Scope2.
B. On the router in each office, configure a DHCP relay.
C. DHCP2. configure a scope that contains 25 percent of the IP addresses from Scope 1 .
D. On each DHCP server, install the Failover Clustering feature and add the DHCP cluster role.
E. On each DHCP scope, configure DHCP failover.
Explanation:
Reference: https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-r2-and-2012/hh831385(v=ws.11)