A.Anincrementalbackuprequiresfewertapesforrestorationthanadifferentialbackup.
B.Adifferentialbackuptapetakeslesstimethananincrementalbackuptape.
C.Adifferentialbackuprequiresfewertapesforrestorationthananincrementalbackup.
D.Anincrementalbackuptapecostslessthanadifferentialbackuptape.
参考答案：C
