单选题Which phrase best describes RMAN multiplexed backup sets？（）AStripes a single backup set across multiple channels.BIdentical copies of backup pieces within a backup set.CMultiple backup sets with multiple channels configured.DSimultaneous reads from multiple files and writes into the same backup piece.
单选题
Which phrase best describes RMAN multiplexed backup sets？（）
A
Stripes a single backup set across multiple channels.
B
Identical copies of backup pieces within a backup set.
C
Multiple backup sets with multiple channels configured.
D
Simultaneous reads from multiple files and writes into the same backup piece.
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