You have a server that runs Windows Server 2003 Service Pack 2 (SP2). You need to identify all the unsigned drivers that are installed on the server. What should you do? （）
A. Run Chkdsk.exe.
B. Run Sigverif.exe.
C. Review %systemroot%\repair\setup.log.
D. Open Device Manager and review all the devices that contain a warning.
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