You are interested in maximizing your virtual resources. If possible, you would like to get a list of
all of your oversized virtual desktops. How can you accomplish this?

A.
Use the command line and query each ESXi server

B.
Use PowerShell to query vCenter and export the data into Excel

C.
Use vCenter and export the data from the performance charts into Excel

D.
Use vCenter Operations Manager for View

Explanation:
http://blogs.vmware.com/management/2013/10/1760.html