What are the prerequisites for converting the single-instance database to an Oracle RAC database?

You are managing a single-instance database and your company wants to convert the single
instance database to an Oracle RAC database. You plan to use the rconfig utility to accomplish
this task.
What are the prerequisites for converting the single-instance database to an Oracle RAC
database?

A.
Oracle Clusterware and Oracle Database software are installed on all target nodes.

B.
The Oracle Database binary is enabled for Oracle RAC on all target nodes.

C.
The database being converted has been backed up successfully.

D.
Oracle Clusterware is stopped.

E.
Automatic Storage Management (ASM) must be enabled and the ASM disk should be available
on all nodes.

Explanation:
C.3.1 Prerequisites for Converting to Oracle RAC Databases
Before you convert a single-instance database to an Oracle RAC database, ensure that the
following conditions are met for each cluster node that you intend to make an Oracle RAC
database node:
Oracle Clusterware 11g release 2 (11.2) is installed, configured, and running.
Oracle RAC 11g release 2 (11.2) software is installed.
The Oracle binary is enabled for Oracle RAC.
Shared storage, either Oracle Cluster File System or Oracle ASM, is available and accessible from
all nodes.
User equivalence exists for the oracle account.
If you intend to use Oracle Enterprise Manager, then all Oracle Enterprise Manager agents are
configured and running, and are configured with cluster and host information.
You have backed up your existing database.
Oracle Real Application Clusters Installation Guide
11g Release 2 (11.2) for Linux and UNIX