Which two statements are true?

Which two statements are true?

A.
The predefined resource role includes the unlimited_tablespace privilege.

B.
The predefined connect role is always automatically granted to all new users at the time
of their creation.

C.
All roles are owned by the sys user.

D.
A role cannot be assigned external authentication.

E.
A role can be granted to other roles.

F.
A role can contain both system and object privileges.