You have an Active Directory domain that runs Windows Server 2008 R2. You need to implement a certification authority （CA） server that meets the following requirements： - Allows the certification authority to automatically issue certificates - Integrates with Active Directory Domain Services What should you do（）
- AInstall and configure the Active Directory Certificate Services server role as a Standalone Root CA .
- BInstall and configure the Active Directory Certificate Services server role as an Enterprise Root CA .
- CPurchase a certificate from a third-party certification authority. Install and configure the Active Directory Certificate S
- DPurchase a certificate from a third-party certification authority. Import the certificate into the computer store of the sc