Your network consists of a single Active Directory domain. All servers run Windows Server 2003 Service Pack 2 (SP2). You have a server named Server1. Server1 is configured as an enterprise root certification authority (CA). You perform a complete backup of Server1 that includes the system state. Server1 fails. You install a new server named Server1. You need to recover the enterprise root CA. What should you do? （）

A. Restore the system state backup.
B. Restore the %systemroot%\system32\certsrv folder.
C. From the Certificates snap-in, import the enterprise root CA certificate.
D. From the Certificates snap-in, import the enterprise root CA certificate revocation list (CRL).