Which technique should you use to minimize down time while plugging this non-CDB into the CDB?

You are about to plug a multi-terabyte non-CDB into an existing multitenant container database (CDB) as a pluggable database (PDB).
The characteristics of the non-CDB are as follows:
-Version:Oracle Database 12c Releases 1 64-bit
-Character set: WE8ISO8859P15
-National character set: AL16UTF16- O/S: Oracle Linux6 64-bit
The characteristics of the CDB are as follows:
-Version: Oracle Database 12c Release 1 64-bit
-Character set: AL32UTF8- O/S:OracleLinux 6 64-bit
Which technique should you use to minimize down time while plugging this non-CDB into the CDB?
A. Transportable database
B. Transportable tablespace
C. Data Pump full export / import
D. The DBMS_PDB package
E. RMAN

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