How to you advise your manager?

In planning for your upcoming transition to vCloud Director, your manager asks you if and how you
can leverage your existing vSphere 5.x installation. How to you advise your manager?

A.
vCloud Director installs a new vSphere infrastructure, but we can reuse the existing shared
storage

B.
We can use the existing vSphere infrastructure but will have to reinstall vCenter

C.
We should start with a fresh vSphere infrastructure dedicated to vCloud Director.

D.
vCloud Director wipes out everything, including shared storage

Explanation:
http://www.vmware.com/files/pdf/products/vCloud/VMware-vCloud-Director-51-Evaluation-Guide.pdf