You have a vSphere deployment consisting of ESXi 5.1 hosts and a vCenter Server 5.5. You are deploying NSX and begin by creating a vSphere Distributed Switch
(vDS) on the vCenter Server using default settings.
What is the next step in preparing the deployment for NSX ?

A.
Use the option Add host networking.

B.
Use the option Add and Manage Hosts.

C.
Deploy NSX on each host.

D.
Upgrade the ESXi hosts.