You have two servers named Server1 and Server2. Both servers run Windows Server 2008 R2.   Server1 is configured as an enterprise root certification authority （CA）.    You install the Online Responder role service on Server2.    You need to configure Server1 to support the Online Responder. What should you do（）

• A、Import the enterprise root CA certificate.
• B、Configure the Certificate Revocation List Distribution Point extension.
• C、Configure the Authority Information Access （AIA） extension.
• D、Add the Server2 computer account to the CertPublishers group.