which three items require a separate procedure or process to update?

An administrator is working to update the hosts and virtual machines in a vSphere 5.x deployment
using Update Manager Baselines.
Other than host patches, which three items require a separate procedure or process to update?
(Choose three.)

A.
Operating system patches

B.
Virtual Appliance updates

C.
Virtual Machine Virtual Hardware upgrades

D.
VMware Tools on machines without VMware Tools already installed

E.
Application patches within the virtual machine

Explanation:

Operating system patches are related to operating system so they need a separate procedure
altogether. Same is the case with VMware tools and applications patches because applications
are stand alone pieces of code that need separate procedure to apply a patch.