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Given the script   create script db_backup_datafile_script  {backup datafile and 1， and2 plus archivelog delete input；} Run {execute script db_backup_datafile_script using 2；}   What is the result of running this command？（）  
A: The script will fail since you instructed RMAN to back up only one datafile rather than two
B: The script will successfully back up datafile 3 without error
C: The script will fail since it uses a substitution variable which is not supported
D: The execute script command will prompt for the value of and2 since it’s not included in the command
E: The script will fail because you cannot use the plus archivelog command when backing up

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出自：Oracle认证

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