Technician B says that the action of a switch can be monitored by a voltmeter Technician B says that continuity across the switch can be checked by measuring the resistance who is correct?

Both Technician A and Technician B are correct in their statements. Technician A is right that a voltmeter can monitor the action of a switch by measuring the voltage across it when the switch is in operation. Technician B is also correct, as measuring the resistance across the switch can verify its continuity when it is in the closed position.