单项选择题

A.ThepreviousDBAdidnotleaveyounotesregardingthestructureofeachofthedatabases.Whileanalyzinganinstance,younoticethatthesystemidentifier(SID)fortheinstanceissetto’+ASM’.Whatisthepurposeofthisinstance?()
A.Thisinstanceisbeingusedtomanagetheoperatingsystemfiles.
B.Thisinstanceisbeingusedtomanagethefilesofotherdatabases.
C.Thisinstanceisbeingusedtomanagetheinstancesofotherdatabases.
D.Thisinstanceisbeingusedtomanagethebackgroundprocessesofotherinstances.