Question: An administrator is performing upgrades to ESXi 5.x from ESX 3.x and ESX 4.x hosts. What is true about this procedure?
A.) A direct, in-place upgrade can be performed only on ESX 4.1 and later hosts.
B.) ESX 3.x hosts can be upgraded, but require an upgrade to 4.x before 5.x.
C.) A direct, in-place upgrade can be performed only on ESX 4.5 and later hosts.
D.) A direct, in-place upgrade can be performed only on ESX 3.5 and later hosts.

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