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

Answer options:

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.

B