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单项选择题 In which situation will you run the script containing the following statement？（）   CREATE CONTROLFILE REUSE DATABASE SALES NORESETLOGS ARCHIVELOG        MAXLOGFILES 20        MAXLOGMEMBERS 3        MAXDATAFILES 30        MAXINSTANCES 10        MAXLOGHISTORY 1200        LOGFILE        GROUP 1 （   ’/disk1/prod/orders/db/log1a.dbf’，        ’/disk2/prod/orders/db/log1b.dbf’        ）SIZE 100K        GROUP 2 （   ’/disk1/prod/orders/db/log2a.dbf’，        ’/disk2/prod/orders/db/log2b.dbf’        ） SIZE 100K，        DATAFILE   ’/disk1/prod/orders/db/database1.dbf’，                                           ’/disk2/prod/orders/db/file1.dbf ’；  

A、 when all the control files are missing and only a binary backup of the current control file exists

B、 when a multiplexed copy of the current control file is missing

C、 when all the control files are missing and only an ASCII representation of the binary control file exists

D、 when the SPFILE is missing

  • B

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