You are designing DNS implemetation Strategy for the new Infrastruce. Which two actions should you perform?（）

• A、Create a Stub Zone in each domain of the root zone.  
• B、Create a _msdcs subdomain in a new zone on the root domain. 
• C、Replicate the _msdcs subdomain across the roor domain.  
• D、Replicate the _msdcs subdomain to the ForestDNS zone applciation partition.  
• E、Configure a zone transfer of the _msdcs subdomain to secondary zone on all DNS servers in the forest.