Do electrons flow through a voltmeter?

Answer 1

The question succeeds brilliantly in avoiding the target cleanly and completely.

Of the three units listed, none is used to measure electrical 'current'. The unit

of current is the "ampere".

Answer 2

Yes. Electrons must flow through anything that uses or otherwise requires electricity.

Answer 3

No, voltage is not the measure of the flow of electric current through a circuit. Voltage is the difference in potential of the source.