An administrator is upgrading an ESX 3.5 host. The host has a single Intel Xeon processor, 4GB
of RAM and a local VMFS datastore on a masked, SAN-attached LUN. Which of the following
could cause the upgrade to be unsuccessful?

A.
The ESX host has 4GB RAM.

B.
The existing VMFS datastore resides on a SAN-attached LUN.

C.
The existing VMFS datastore has 6GB of free space.

D.
The ESX host has 1 processor.