An administrator is upgrading an ESX 3.5 host to ESXi 5.x with an intermediate upgrade to ESX
4.0 using Update Manager. The host has a single Intel Xeon processor, 4GB of RAM, and a VMFS
datastore on a private, SAN-attached LUN.
What might cause the upgrade to be unsuccessful?

A.
Update Manager does not support upgrading from ESX.

B.
The host has one processor.

C.
The host has 4GB RAM.

D.
ESX 3.5 is not supported by Update Manager.