Which is not a valid decision?

You are in the process of planning a deployment in which a single WebLogic cluster will
host a web application. There are several options to consider. Which is not a valid decision?

A.
Proxyplug-inorhardwareload balancer

B.
Configured or dynamic cluster

C.
ReplicatedorpersistentHTTP sessions

D.
Unicast or multicast communication

E.
Single or multiple domains