What is the process you should follow to complete the upgrade successfully?

You are planning to perform a topology upgrade of VPLEX Local to VPLEX Metro.

What is the process you should follow to complete the upgrade successfully?
A . 1. Upgrade the existing cluster
Run the I/O module upgrade script
Cable the WAN COM connections
Register the cluster
Configure the new cluster
B . 1. Run the I/O module upgrade script
Cable the WAN COM connections
Upgrade the existing cluster
Configure the new cluster
Register the cluster
C . 1. Upgrade the existing cluster
Register the cluster
Configure the new cluster
Run the I/O module upgrade script
Cable the WAN COM connections
D . 1. Cable the WAN COM connections
Run the I/O module upgrade script
Configure the new cluster
Register the cluster
Upgrade the cluster