（单选题）
Which statement is true regarding RMAN components？（）
AEach target database requires its own recover catalog.
BRMAN scripts can be stored in the recovery catalog or the target control file.
CA channel is a stream of data to a device type and corresponds to one server session.
DThe RMAN executable interprets sever session commands and establishes connections to the target database.
正确答案
答案解析
略
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