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