A.run{openscriptbackup_database;runscriptbackup_database}
B.run{engagescriptbackup_database;}
C.run{runscriptbackup_database;}
D.Run{executescriptbackup_database;}
E.Thenamebackup_databaseisaninvalidnameforanRMANscript.TryingtorunitfromRMAN wouldresultinanerror.