You want to use RMAN to create compressed backups.  Which statement is true about the compression algorithms that RMAN can use?()
A: The BZIP2 compression algorithm consumes more CPU resources than the ZLIB compression algorithm.
B: The ZLIB compression algorithm consumes more CPU resources than the BZIP2 compression algorithm.
C: The ZLIB compression algorithm provides maximum compression and produces smaller backups than the BZIP2 compression algorithm.
D: Only the BZIP2 compression algorithm can be used to make compressed backups to disk.
出自:Oracle认证