Your company uses a Windows 2008 Enterprise certificate authority （CA） to issue certificates. You need to implement key archival. What should you do（）

• A、Archive the private key on the server.
• B、Apply the Hisecdc security template to the domain controllers.
• C、Configure the certificate for automatic enrollment for the computers that store encrypted files.
• D、Install an Enterprise Subordinate CA and issue a user certificate to users of the encrypted files.