单项选择题

A.OntheHMCtheslotshowsempty.Thedevicedriverhasbeeninstalledandcfgmgrrunsnormally.Whatisthemostappropriateactiontosolvethisproblem?()
A.UpdatetheHMCsoftware
B.Updatethesystemfirmware
C.Re-installthedevicedriver
D.Flashupdatethetwo-portcard