Which two statements are correct?

In a design session, a colleague makes the following comments about cluster support for Oracle
SOA Suite 11g application. Which two statements are correct?

A.
A cluster appears to clients as multiple WebLogic Server instances

B.
The server instances in a cluster must all run on the same machine.

C.
You can scale a cluster by adding machines to the cluster to host additional server instances.

D.
Server instances in a cluster can run different versions of WebLogic Server.

E.
You can create it cluster by using WLST, the WebLogic Server Administration Console or
Enterprise Manager Fusion Middleware Control.

F.
For management purposes, you can split a cluster across multiple domains.

Explanation:
C: Scale by adding machines:
* A WebLogic Server cluster provides these benefits:

Scalability
The capacity of an application deployed on a WebLogic Server cluster can be increased
dynamically to meet demand. You can add server instances to a cluster without interruption of
service—the application continues to run without impact to clients and end users.
High-Availability
Incorrect:
Not A. They appear as one weblogic server instance.
Not B. They can run on sepate machines.