How can you do this?

A CDB, CDB1, has a LOCATIONS application container.
NORTH_PDB and SOUTH_PDB are two application PDBs in LOCATIONS.
Both application PDBs are synchronized with the application installed in the LOCATIONS root… In CDB2, you create a remote clone, LOC_R, of the LOCATIONS application root.
You want to query data across the LOCATIONS application PDBs created in CDB1 and CDB2.
How can you do this?
A. by creating a proxy PDB in LOCATIONS_ROOT in CDB1, referencing LOC_R
B. by creating a proxy PDB in CDB1 root, referencing LOC_R
C. by using private database links created in CDB1 and CDB2
D. by using public database links created in CDB1 and CDB2
E. by creating a proxy PDB in CDB2 root, referencing LOC_R

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