You created a new database using the "create database" statement without specifying the "ENABLE PLUGGABLE" clause. What are two effects of not using the "ENABLE PLUGGABLE database" clause? 

Answer options:

A. The database is created as a non-CDB and can never contain a PDB.B. The database is treated as a PDB and must be plugged into an existing multitenant container database (CDB).
C. The database is created as a non-CDB and can never be plugged into a CDB.D. The database is created as a non-CDB but can be plugged into an existing CDB.E. The database is created as a non-CDB but will become a CDB whenever the first PDB is plugged in.

AD

A (not B,not E): The CREATE DATABASE ... ENABLE PLUGGABLE DATABASE SQL statement creates a new CDB. If you do not specify the ENABLE PLUGGABLE DATABASE clause, then the newly created database is a non-CDB and can never contain PDBs. D: You can create a PDB by plugging in a Non-CDB as a PDB. The following graphic depicts the options for creating a PDB: 

Incorrect: Not E: For the duration of its existence, a database is either a CDB or a non-CDB. You cannot transform a non-CDB into a CDB or vice versa. You must define a database as a CDB at creation, and then create PDBs within this CDB.