What type of virtual switch exists only within a single vSphere hypervisor?

All of the following are ways to avoid injuries when working on computers EXCEPT ________

A) ensuring proper lighting B) purchasing an adjustable chair C) taking breaks D) placing a monitor at least 12" from the eyes

Office ________ is an artistic design in the upper right area of the title bar

A) Background B) Backstage C) Account D) 365