The first step in creating a cluster is to create:

a-a bundle

b-a subvi

c-a cluster shell

d-none of the above

(C) A cluster shell

Explanation:

 When we create a cluster, the first step is to creating a cluster shell. The cluster shell is the define as the event driven framework in the python. The cluster is the group of the multiple server that run in the identical configuration.  

The cluster shell is basically design to run a local command on the server in the form of parallel by using the large cluster in the linux. All the clusters worked together in the system for providing the high scalability and reliability.

Therefore, Option (C) is correct.