Your customer has upgraded their on-premises 11.2 Database to 12.2. During this migration, the database was migrated to a pluggable database (PDB) and is now in production.
How should the customer unplug their database to migrate to an Autonomous Database?
To migrate a pluggable database (PDB) to an Autonomous Database, the standard process involves unplugging the PDB into an XML file. This XML file, along with the associated database files, can then be uploaded to Object Storage. This method helps in preserving the database structure and metadata, making it ready for migration. PDBs cannot be migrated using the simple plug, unplug, or clone methods directly into an Autonomous Database using the other options.
I think that the correct answer is A
No PDB