You are designing a DHCP strategy to meet the business and technical requirements.  What should you do？（）

A.Install one DHCP server in each branch office and one DHCP server in Los Angeles.

B.Install one DHCP server in each branch office and two DHCP servers in Los Angeles.

C.Install two DHCP servers in each branch office and one DHCP server in Los Angeles.

D.Install two DHCP servers in each branch office and two DHCP servers in Los Angeles.