What does a multimeter measure?

A multimeter is a versatile tool primarily used for measuring electrical quantities, making the option focusing on voltage, current, and resistance the most accurate representation of its capabilities. In particular, a multimeter can measure direct current (DC) voltage, alternating current (AC) voltage, and resistance by using its internal circuitry to provide readouts for these values.

Voltage measurement allows the user to determine the electrical potential difference between two points in a circuit. Current measurement is crucial for diagnosing circuit conditions, letting the user understand how much electric charge is flowing. Resistance measurement helps in evaluating the integrity of components and detecting faults in circuits.

While some multimeters may have additional functions that allow them to measure parameters such as inductance, capacitance, and frequency, these are not standard features found in all multimeters and often pertain to specialized devices. Additionally, measuring environmental variables such as temperature, pressure, and flow is beyond the scope of typical multimeter functions, as they are designed specifically for electrical measurements. Thus, the option highlighting voltage, current, and resistance accurately reflects the core functions of a multimeter.