Your database is running in ARCHIVELOG mode, and the database is open. You execute an RMAN backup and specify the KEEP clause.
Which components are backed up when this option is specified?
A. only the control file, the current SPFILE, and data files
B. only the current SPFILE and data files if autobackup is disabled
C. only the data files and the archived redo logs
D. the control file, current SPFILE file, data files, and archived redo logs
原文：http://www.cnblogs.com/Babylon/p/7845182.html