Which two tasks must be performed before launching the …

Which two tasks must be performed before launching the Oracle universal installer to install Oracle Database
Software for RAC?

A.
SSH user equivalence for the Oracle software owner must be configured on all cluster nodes.

B.
Grid infrastructure must be installed on all cluster nodes where the Database software will be installed.

C.
SSH user equivalence for the Oracle software owner must be configured on all cluster nodes where the
Database Software will be installed.

D.
Grid infrastructure must be installed on all cluster nodes.

E.
The Clusterware stack must be up on all cluster nodes.