What is the purpose of the RMAN recovery catalog? (Choose all that apply.)

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What is the purpose of the RMAN recovery catalog? (Choose all that apply.)

A. It must be used because all RMAN-related backup and recovery metadata information is contained in it.
B. It provides a convenient, optional, repository of backup- and recovery-related metadata.
C. It provides the ability to store RMAN scripts for global use by any database that has access to the repository.
D. It provides a means of storing all RMAN backup sets physically in an Oracle database server. E. It provides the ability to store backup records for more than a year.