Which two statements are true about a multitenant architecture?

Which two statements are true about a multitenant architecture?

A.
Each PDB has a private control file.

B.
A PDB can have a private temporary tablespace.

C.
Log switches occur only at the container database level.

D.
Each pluggable database (PDB) has its own initialization parameter file.

E.
A PDB can have a private undo tablespace.