Which two steps are needed to set up Failover support for an OBIEE deployment?

Which two steps are needed to set up Failover support for an OBIEE deployment?

A.
Use Installer to affect Horizontal scale out of an existing instance

B.
Leverage spare hardware capacity of single machine by using Verticalscale out option

C.
Apply OBIEE Clustering option

D.
Employ WebLogic Enterprise Edition, licensed separately

E.
Use Installer to set up separate single instances, then apply Horizontal scale out
clustering

Explanation: