After analyzing the output， which conclusion will you draw？（） 
（单选题）
You issued the RMAN> SHOW ALL； command. The output of this command is as follows： 
After analyzing the output， which conclusion will you draw？（）
A The backups consist of backup pieces.
B The datafiles can be multiplexed within the backup.
C The backups can be stored only on the disk.
D While performing the backup across a network， the network bandwidth is reduced.
正确答案
答案解析
略
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