Your network contains an internal network and a perimeter network. The internal network contains an Active Directory forest. The forest contains a single domain. You plan to deploy 10 Edge Transport servers on the perimeter network. You need to recommend a solution for the Edge Transport server deployment. The solution must meet the following requirements： .Allow administrators to apply a single security policy to all Edge Transport servers .Reduce the administrative overhead that is required to manage servers .Minimize the attack surface of the internal network What should you recommend？（）
- AImplement Network Policy and Access Services （NPAS）.
- BImplement Active Directory Federation Services （AD FS）.
- CCreate a new Active Directory domain in the internal forest， and then join all Edge Transport servers to the new domain.
- DCreate an Active Directory forest in the perimeter network， and then join all Edge Transport servers to the new domain.