Youhavelostdatafiles1and3fromyourdatabase，andthedatabasehascrashed.Inwhatordershouldyouperformthefollowingstepstorecoveryourdatabase？（）1.Takethedatafilesthatwerelostoffline.2.startupmountthedatabase3.Issuethealterdatabaseopencommand.4.Restorethedatafilesthatwerelost5.Recoverthedatafileswiththerecoverdatafilecommand.6.Bringthedatafilesbackonline.7.Recoverthedatabasewiththerecoverdatabasecommand.

A.2，1，3，4，5，6

B.2，4，5，3

C.4，7，3

D.2，4，7，3

E.2，7，3