Which statement is true regarding virtual private catalogs?（）

A. virtual private catalog owner can create a local stored script, and have read/write access to a global stored script.

B. The virtual private catalog owner cannot create and modify the stored scripts.

C. The set of views and synonyms that make up the virtual private catalog is stored in the schema of the RMAN recovery catalog owner.

D. To perform most of the RMAN operations, the virtual catalog owner must have the SYSDBA or SYSOPER privilege on the target database