Why is a virtual machine useful? a.) it creates an extra file backup.
b.) it increases internet speeds.
c.) it stimulates multiple computers with one physical computer.
d.) it connects multiple computers together.

The correct answer to this question is given below in the explanation section.

Explanation:

The given options of the question are:

The correct option to this question is 4. i.e:

The virtual machine is useful because it stimulated multiple computers with one physical computer.  You can run many operating systems on a virtual machine at one physical computer. It will reduce the cost of buying a new computer and internet connectivity cost among computers.

While other options are not correct because:

VM does not create an extra file backup, it will create a backup according to your assigned needs. It does not increase the internet speed and does not connect multiple computers together but it connects multiple virtual machine operating systems togethers.

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