You went to create a new CDB foe your customer. Which two statements are true about the seed pluggable database that will reside in the new CDB? 

Answer options:

A. You have to copy the seed data files yourself,
B. You can use the new SEED FILE_NAME_CONVERTclause in the CREATE DATABASE statement.
C. The seed pluggable database is not required.
D. The seed pluggable database does not require data files.
E. The seed pluggable database is always kept in READ ONLY mode.
F. The seed pluggable database is not a container.
G. The seed pluggable database can be dropped.

BE

http://docs.oracle.com/database/121/ADMIN/cdb_create.htm#BABHACEC