If a window in Windows 8 is maximized, the center button on the title bar changes to the ________ button

Databases that use __________ usually hide the Navigation Pane so that users only see it when they open the database

Fill in the blank(s) with correct word

Which option(s) is (are) not among the top four hypervisors currently being used?

A) KVM B) Boostv C) vSupervisor D) XenServer