Alargecorporationisconcernedabouttheamountoftimeittakestobackuptheirmainfileserver.TheyarealsoconcernedthattheirITtechnicianfrequentlyforgetstochangethebackuptapes，therebyleavingthecompanyopentodataloss.Whichbackupsystemwouldsolvebothproblems？（）
A.RAID
B.tapelibrary
C.opticalstorage
D.disktodisktotape
参考答案：B
