Which three programs or utilities can be used to convert a single-instance database to a Real Application Cluster database?

Which three programs or utilities can be used to convert a single-instance database to a Real
Application Cluster database?

A.
DBCA

B.
the SRVCTL utility

C.
Enterprise Manager

D.
the RCONFIG utility

E.
the CRSCTLl utility

Explanation:
Single Instance to RAC Conversion
Single-instance databases can be converted to RAC using:
DBCA
Enterprise Manager
RCONFIG utility
D60488GC11
Oracle 11g: RAC and Grid Infrastructure Administration Accelerated