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.