What is a virtual appliance?

A.
A master copy of a virtual machine with a standardized virtual hardware and software
configuration that is used to create new virtual machines

B.
An interface to view and manage the virtual machines on a physical compute system or a
compute cluster

C.
A preconfigured virtual machine, preinstalled with a guest OS and an application,
dedicated to a specific function

D.
Software installed on a computer system that enables multiple virtual machines to share
the resources of the computer system

Explanation: