Which two statements are true about cluster configuration?

Which two statements are true about cluster configuration?

A.
A server must be running before it can be added to a cluster.

B.
You cannot define cluster membership through the Configuration Wizard.

C.
The console allows you to add new and existing servers to a cluster.

D.
The console allows you to add an administration server to a cluster.

E.
You cannot remove a server that is running from a cluster.

Explanation:
C: To assign server instances to a cluster:
Note: You cannot change the cluster of the Administation Server using the Administration
Console. You cannot change the cluster or machine of a running server.
The new server appears in the list of servers and is added as a member of the current cluster.
Incorrect answer:
Not A. See screenshot below.

Reference: edocs Home > Oracle WebLogic Server Documentation > Administration Console
Online Help > Assign servers to clusters