[多项选择]You are designing a strategy to assign the IP addresses to meet the business and technical requirement. Which two actions should you perform?（）
A. Install and Configure one DHCP server in Atlanta and one DHCP server in each branch office.
B. Install and Configure two DHCP servers in Atlanta and two DHCP servers in each branch office.  
C. Create one scope on each DHCP server. Specify one DHCP server to always update DNS records. Configure the scope to assign half of the IP addresses available to each office.  
D. Create two scopes on each DHCP server. Specify one DHCP server to update DNS records only for client computers that request it. Specify a second DHCP server to never update DNS records.