Compressed backups work with which of the following commands？（）

Consider the following command：  Backup database plus archivelog delete input；  How many backup sets would be created by this command if the following were true：（）  Control-file a NN uto backups were enabled.  NN The size of backup sets was not restricted.  NN One channel was allocated.

A. 1
B. 2
C. 3
D. 4
E. 5

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WhattypeofbackupisstoredinaproprietaryRMANformat？（）

A. Backup set
B. Image copy
C. Backup section
D. Backup group

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