If a digital multimeter set up to measure AC volts reads slightly above 'zero' when its leads are disconnected, what is this a result of?

Correct Answer: Option D — 'ghost' voltages due to electromagnetic energy in the air

Digital multimeters can sometimes display small AC voltage readings when leads are open due to 'ghost' voltages. These are induced voltages from nearby electromagnetic fields, not a sign of miscalibration or internal capacitor issues, and are typically negligible.