which three statements are true?

When describing a WebLogic domain, which three statements are true?

A.
A domain may be set up in either Production Mode Production Mode or Development Mode.

B.
All instances of WebLogic Server must be defined within a domain.

C.
The domain configuration is stored in Oracle database by default.

D.
Any instance of WebLogic Server may update the domain configuration

E.
The security realm for a domain is optional.

F.
A domain maybe created by using the Configuration Wizard.

Explanation:
A: All servers in a domain run either in development mode or production mode.
F: If you want to create a new domain, you can use the Configuration Wizard (or WLST or Unpack
command).