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

A.
Transportable tablespace

B.
Data Pump full export / import

C.
The DBMS_PDB package

D.
RMAN

E.
Transportable database