Which two are true concerning a multitenant container database with three pluggable database?

Which two are true concerning a multitenant container database with three pluggable
database?

A.
The pluggable databases are patched together.

B.
Pluggable databases are only used for database consolidation.

C.
The pluggable databases reduce administration effort.

D.
The pluggable databases increase patching time.

E.
All administration tasks must be done to a specific pluggable database.