You have three applications from three different vendors, but only one system to run them on. Each application will require different OS patches to be installed. The problem you will encounter, if you load all of these applications on the same server, is that the vendor will not support the application if it runs on anything but the recommended environment. Which answer provides a solution?

A.
Zones will not work in this scenario -use domains.

B.
Run each application in a separate non-global zone. Patch each zone separately.

C.
Run each application in a separate non-global zone. Patch the non-global zones with the most current patch versions.

D.
Run each application in a zone. Install one application in the global-zone and patch it with the most current patch versions allowed. Do not patch the non-global zones.