YouaremaintainingtheSALESdatabaseofacompany.YouhaveneverbackeduptheUSERStablespacethatiscurrentlyofflinE.OnSunday，youissuedthefollowingcommands：CONFIGUREDEFAULTDEVICETYPETOsbt；CONFIGUREBACKUPOPTIMIZATIONON；CONFIGURERETENTIONPOLICYTOREDUNDANCY3；FromMondaytoSaturday，youperformedthefollowingactions：DayActionMondayBACKUPDATABASETuesdayBACKUPDATABASEWednesdayBACKUPDATABASEThursdayBACKUPDATABASEFridayBACKUPDATABASESaturdayBACKUPDATABASEHowmanytimeswillthebackupoftheUSERStablespacebeperformed？（）
A.YouhaveneverbackeduptheUSERStablespacethatiscurrentlyofflinE.OnSunday，youissuedthefollowingcommands：