A multimeter is a test instrument used to measure.

Select one:
A. the insulating properties of electrical enclosures
B. whether a wiring circuit and enclosure is adequate to provide proper grounding
C. the thickness of insulation around wiring
D. two or more electrical quantities, such as AC and DC current, voltage, and resistance

A multimeter is a versatile instrument used to measure electrical quantities like voltage, current, and resistance, aiding in diagnosing and maintaining electrical systems.

Explanation:

A multimeter is a versatile test instrument that is used to measure various electrical quantities such as voltage, current, and resistance. Ohmmeters measure resistance based on Ohm's law, while voltmeters measure potential difference in a circuit.

These instruments are crucial tools in electrical testing, allowing technicians to diagnose circuit issues and ensure proper functioning of electrical systems. Multimeters can be used as ammeters, voltmeters, and ohmmeters, making them indispensable in electrical work.

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